QuestionSubIdChaptIdQuestionOPt1OPt2OPt3Opt4AnsNO11The "first light" of big bang from the far side of universe has recently been detected by the radio-telescopes asSound wavesWater waveslight wavesradio waves311the wold of complex matter falls in a category ofworld of extremely large bodiesworld of extremely small bodiesworld of middle-sized bodiesall of them411The branch of physics in which we study the matter and energy and the relationship between them is calledBiologyChemistryPhysicselectronics311Many physicists started believing that every thing about physics has been discovered by the end of17th century18th century19th century20th century311the branch of physics which deals with the atomic nuclei is callednuclear physicsatomic physicsparticule physicsmodern physics111the branch of physics which is concerned with the atomic nuclei is callednuclear physicsatomic physicsmodern physicsparticle physics111the relativistic mechanics is the branch of physics in which we deals with the velocities of bodiesequal to velocity of lightgreater than the velocity of lightapproaching to velocity of lightany of the above311the branch of physics in which we study the structure and properties of solids is callednuclear physicsmodern physicsparticle physicssolid state physics411the most fundamental of all sciences which provides basic principles and fundamental laws to other branches of science isphysicschemistrybiologyinformation technology111we are living in the age ofchaostechnologypeaceinformation technology411The computer chips are made ofsemi-conductorssiliconsandconductors211Silicon can be obtained fromrocksmudsandwater311Which of the following are the interdisciplinary areas of physics I) astrophycs (ii) chemical physics (iii) geophysicsOne of themtwo of themthree of themall of them411the quantities like mass, length, time, velocity, force, temperature and electric current are the examples ofScalar quantitiesvector quanttiesphysical quantitiesnone of the above311physical quantities are divided intotwo categoriesthree categoriesfour categoriesas many as we can111The quantitites whose definitions are based on the other physical quantitites are calledScalar quantitiesvactor quantitiesbase quantitiesderived quantities411Velocity, acceleration, force, area, volume are all examples ofScalar quantitiesVector Qquantitiesbase quantitiesDerived quantities411Length, mass, time, current and intensity of light are all examples ofScalar quantitiesvector quantitiesbase quantitiesderived quantities311Is charge a base SI quantity.yesnosometimesAll of the above211the SI unit of amount of substance isampere (A)Kelvin (K)candela (CD)mole (mol)411the units of plane angle and solid angles are the examples ofBbase unitsderived unitssupplementary unitsnone of them312The direction of a vector in a plane is denoted by the angle which the vector makes with positive x-axis in theanti-clock wise directionclock-wise directionupwardsdownwards112The direction of a vector in space is specified by theone angletwo anglesthree anglesnone of them312In head to tail rule of vector addition, the sum of two or more than two vector can be found byjoining the tail of the first with the head of secondjoining the head of the first with the tail of secondjoining the head of the first with the head of secondjoining the tail of the first with the tail of second212The vector addition process is adistributive processassociative processcommutativenone of them312A single vector which have the same effect as all the original vectors taken together is called theunit vectorresultant vectornull vectorequilibrant212In order to subtract a vector B from from vector A wereverse the direreverse the direction of B and add it to AKeep the same direction of B and add it to Akeeep the same direction of B and subtract it from A212Subtraction of vector B from vector A we use the following mathematicalrelationA- B=A-BA-B=A+bA-B=A+(-B)A-B=A-(+B)312When a vector A is multiplied by a positive number n then the new vector nA has thesame director as A but a magnitude n times the magnitude of Aopposite direction on A but a magnitude n times the magnitude of Asame direction as A and same magnitude as of Aopposite direction but same magnitude as of A112When a vector A is multiplied by a negative number -n: then the new vector -nA has theopposite direction as A but a magnitude 'n' times the magnitude of Asame direction as A but a magnitude 'n' times the magnitude of Asame direction and same magnitude as of Aopposite direction and same magnitude as of A112When velocity is multiplied by scalar mass 'm: the product is a new vector quantity called momentium having thesame dimensions as that of velocitysame dimensions as that of masssame dimensions of mass and velocitynew dimensions different form mass and velocity312A vector in a given direction with magnitude one is callednull vectorequal vectorresultant vectorunit vector412Null vector is a vector which haszero magnitude but has a certain directionzero magnitude but has an arbitrary directionarbitrary magnitude and certain directionarbitrary magnitude and arbitrary direction212Mathematically a null vector can be represented asA + A =0A + (-Ax)=0A + (-A) =0all of them312Rectangular components of a vector are those components which have the following angle between them0304590413The magnitude of the displacement is a line form initial position to final position which isstraightcurvedeither straight or curvednone of them413the displacement coincides with the path of the motion when a body moves in acurved linestraight linemay be curved or straightnone of them213velocity is aScalar quantitiesvector quantityconstant quantitynon of them213Dimensions of velocity are[L][T][LT-1][LT-2313when we consider the average velocity of a body, then the body is moving instraight linecurved pathmay be in a straight or curved pathnone of them313if a ball comes back to its starting point after bouncing off the wall several times, then itstotal displacements is zeroaverage velocity is zeronone of themboth of option 1 and 2413The instantaneous velocity is define as the limiting value of d/t on the time interval t approaches tozeromaximumminimuminfinity113if the instantaneous velocity of a body does not change, the body is said to be moving withaverage velocityuniform velocityinstantaneous velocityvariable velocity213The rate of change of velocity is known asdisplacementdistancevelocityacceleration413acceleration is ascalar quantityimaginary quantityvectorfixed quantity313velocity of a body changes ifdirection of the body changesspeed of the body changesneither speed nor direction changes,either speed or direction changes413the direction of the acceleration is the same as that ofspeedvelocityboth of themnone of them213acceleratio of a body at any particular instant during its motion is known asaverage accelerationuniform accelerationinstantaneous accelerationall of them313If the velocity of a body changes by egqual amount in equal intervals of tiem, the body is said to haveaccelerationuniform acceleratininstantaneous accelerationuniform velocity413when a body is moving with uniform acceleration, its average acceleration isless than instantaneous accelerationgreater than instantaneous accelerationequal to instantaneous acceleraitonmay be all of them313The distance travelled by a body in one second is calledspeedvelocityaccelerationaverage velocity114If the angle 0 between the force and displacement is less than 90, then the work done will bepositivenegativezeromaximum114If the angle 0 between the force and displacement is equal to 90, then the work done will bepositivenegativezeromaximum314If the angle between the force and displacement is grater then 90, then the work done will bepositivenegativezeromaximum214If the displacement occurs in the direction of force, then the work done will bepositivenegativezeromaximum414the SI Unit of work isN-sN-m2N-mN-m-2314in which of the following, force does not remain constant during the process of doing work (I) a rocket moves away form earth (ii) work done against the force of gravity (iii) force exerted on the spring(I) only(I) and (ii) only(I),(ii) and (iii) only(d) none of them314A force of 5N applied on a body and the body moves 4.5 meters in the direction of applied force, then the work done will be20 N22.5 N20J22.5 J414The space around the earth in which its gravitational force acts on a body is calledMagnetic fieldelectric fieldelectromanetic fieldgravitational field414In the gravitational field, the work done will be negative, ifthe displacement is in the directin of gravitational forcethe displacements is against the gravitational forcethe displacemetn is perpendicular to the gravitational forcethe displacement is zero214In the gravitational field, the work done will be positive, ifthe displacement is in the direction of gravitational forcethe displacements is against the gravitaiotnal forcethe displacement is perpendicular to the gravitational forcethe displacement is zero114The gravitational field isnon-conservatiove filedconservative fieldconstant fieldall of them214work done in Earth's gravitational field isindependent of the path followeddependent of the path followedboth of themneither of them114the field in which the work done is independent of the path followed or work done in a closed path is zero is called avariable fieldconstant fieldnon conservative fieldconservative field414which of the following is example of non conservative forcefrictional forcedamping forceviscous forceall of them414the rate of doing work is known asworkpowerenergymomentum214power is avector quantityscalar quantityimaginaryconstant quantity214The Si unit is power isjouleKg-m/snewtonwatt414kilowatt hour is aunit ofmechanical energypotential energyelectrical energykinetic energy315Angle subtended at the centre of circular path by a body is known aslinear displacementangular displacementlinear velocityangular velocity215when a body is moving in a clockwise direction then the angular displacement iszero magnitude but has a certain directionmaximumnegativepositive315when a body is moving in anticlockwise direction in a circle, then the angular displacement is taken aszeromaximumnegativepositive415the direction associated with the angualr displacement isalong the radiusperpendicular to radiusalong the axis of rotationall of them315the direction of angular acceleration is given byleft hand ruleright hand rulefleemings left hand rulefleemings right hand rule215according to the right hand rule, the direction of angular displacement is along thethumbfirst fingerssecond fingernone of them115according to the right hand rule, the direction of motion of a body is indicated bythe direction of thumbdirection of first fingercurl of the fingersnone of them415the SI unit of angular displacement isdegreerevolutionradianall of them315One radian is equal to6018036057.3415when a body completes one revolution, then the angular displacement in degrees is18027036090315the rate at which angular displacement is changing with time is calledlinear displacementvelocitylinear velocityangular velocity415angular displacement is ascalar quantityvector quantityconstant quantityall of them215angular velocity is ascalar quantityvector quantityfixed quantitynone of them215the SI unit of angular velocity isrevolution per secondrevolution per minuteradians per secondradians per minute315rate of change of angular velocity is defined asaccelerationlinear accelerationinstantaneous accelerationangular acceleration415the direction of angular velocity isalong the radiusperpendicular to radiusalong the circlealong the axis of rotation415which of the following quantity has direction along the axis of rotationangular displacementangular velocityangular accelerationall of them415the direction of angular acceleration is given byleft hand rulefleemings left hand ruleright hand rulefleemings right hand rule315any point on a rigid body which is moving in a circular path can be completely described bybody moving in a straight linebody moving in a circular pathmay be in straight line or circular pathneither in straight line nor in circular path215the direction of linear velocity of a body moving in a circle isalong the axis of rotationalong the radiusperpendicular of radiusnone of them315the linear velocity of a body moving in a circular path is also known asangular velocityradial velocitytangential velocitynone of them316substances that do not flow easily havelarge coefficient of viscositysmall coefficient of viscosityeither of themnone of them116substances that flow easily havelarge coefficient of viscositysmall coefficient of viscosityeither of themnone of them216liquids and gases havezero viscositynon zero viscosityvery large viscosityvery small viscosity216an object moving through a fluid experiences a retarding force called africtional forceterminal forceopposing forcedrag force416when the speed of a body in a fluid increases then the drag forcedecreasesbecomes zeroincreasesnon of them316at low speeds, the drag force isproportional to speedinversely proportional to speednot simply proportional to speednone of them116at high speeds, the drag force isproportional to speedinversely proportional to speednot simply proportional to speednone of them316when a water droplet falling freely through air, the drag force on water droplet increases with thedecrease in speedincrease in speedpressurenone of them216when a water droplet falls through air, the net force on it isnet force = drag force - weightnet force = weight - drag forcenet force = drag force + weightnet force = weight + drag force216when weight of an object falling freely becomes equal to the drag force, then the body will move withincreasing speeddecreasing speedconstant speednone of them316during the free fall motion of an object, when its weight becomes equal to the drag force, then it will move withmaximum speedminimum speedzero speedall of them116the body will move with terminal velocity when it acquiresminimum speedzero speedmaximum speednone of them316when the body reaches its terminal velocity, the acceleration of the body becomesmaximum speedminimum speedzeroconstant quantity316at the starting point of the free fall motion of an object its speed will bemaximum speedminimum speedzeronone of them216a water hose with an internal diameter of 20 mm at the outlet discharges 30 kg of water in 60 s. what is water speed at the outlet if density of water is 1000 Kg/m3 during its steady flow.1.3 m/s1.6m/s1.9 m/s2.2 m/s216the direction of the streamlines is the same as the direction of theforcetorquevelocityweight316when the different streamlines cannot cross each other, then this condition is known ascontinuity conditionturbulent flow conditionsteady flow conditionnone of them316when each particle of the fluid moves along a smooth path, this path is known asstraight pathsmooth pathhaphazard pathstreamline416during the steady flow, different streamlinescannot across each othercan across each othereither of themneither of them116if every particle of the flow that passes a particular point, moves along the same path as followed by particles which passed the point earlier, then this flow is said to beturbulentstreamlineabruptnone of them216when a fluid is in motion, its flow can be considered asturbulentstreamlineeither of themneither of them316according to the equation of continuity, when water falls from the tap, it's speed increases and its cross sectional areadecreasesincreasesbecomes zeronone of them116the product of cross sectional area of the pipe and the fluid speed at any point along the pipe isvery highvery lowconstantzero317the force which opposes the applied force producing the displacement in the spring is calledrestoring forceperiodic forcecentripetal forceresistive force117the vibratory or oscillatory motion of a body istranslatory motionback and forth motion about its mean positionfree fall motioncircular motion217the vibratory motion of a body whose magnitude of acceleration is directly proportional to the magnitude of its displacement and is always directed towards the equilibrium position is called.rotatory motionmotion under gravityangular motionsimple harmonic motion417one complete to and fro trip of the body about its mean position is calleddisplacementvibrationa complete motionan acceleration217the time required to complete one vibration is calledtime periodfrequencytime periodvelocity317the number of vibrations completed by a body in one second is calledtime periodfrequencytotal vibrationsdisplacement217the distance of vibrating body at any instant from its equilibrium position is calleddisplacementfrequencyamplitudetime period317for a body executing S.H.M, itsmomentum remains constantpotential energy remains constantkinetic energy remains constanttotal energy remains constant417when a body is performing S.H.M., its acceleration isinversely proportional to the displacementdirectly proportional to the applied forcedirectly proportional to the amplitudedirectly proportional to the displacement but in opposite direction417which of the following is an example of a S.H.M?motion of a projectilemotion of a train along a circular pathmotion of swingelectrons revolving sound the nucleus317which of the following does not exhibit S.H.M?a plucked violin stringa mass attached to a springa train shunting between two terminalsa simple pendulum317if the displacement of a body executing S.H.M is plotted against time, then the curve is known asfrequency of S.H.Mperiod of S.H.Mwave formnone of them317the wave from of S.H.M will besquare wavesine waverectified wavesaw tooth wave217an object undergoes S.H.M has maximum speed when its displacement from the mean position ismaximum speedzerohalf of the maximum valueone third of the maximum value217an object undergoes S.H.M has maximum acceleration when its displacement form the mean position ismaximumzerohalf of the maximum valueone third of the maximum value117SI unit of time period issecondhertzrevolutio nvibration/sec118In case of mechanical waves, we study the motion ofa singl eparticlecollection of particlesany one of themnone of them318a wave, which transfers energy by moving away from the source of disturbance is called aprogressive wavetravellign waveboth of themnone of them318example of progressive wave istransverse waveslongitudinal wavesboth of themnone of them318the waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are knowns aslongitudinal wavestransverse wavesnon mechanical wavesnone of them218the waves in which the particles of the medium have displacement along the direction of propagation of waves are calledlongitudinal wavestransverse wavesnon mechanical wavesnone of them118which type of wave can be set up in solidslongitudinal wavestransverse wavesboth of themnone of them318which type of wave can be set up in fluids.longitudinal wavestransverse wavesboth of themnone of them118sound is an example oflongitudinal wavestransverse wavesboth of themnone of them118waves on the water surface is an example oflongitudinal wavestransverse wavesboth of themnone of them218when we make a single disturbance in a medium, then the wave produced in the form ofa periodic wavea continuous wavea pulsenone of them318an oscillating mass spring system is an example ofpulsediscontinous waveperiodic wavenone of them318a pattern in which the particles of the medium are displaced above the equilibrium position is calledtroughcrestamplitudefrequency218a pattern in which the particles of the medium are displaced below the equilibrium position is calledtroughcrestamplitudefrequency118the maximum displacement of the particles on either side of the equilibrium positio is calledtroughcrestamplitudefrequency318wavelength is the distance betweenany two crestsany two troughstwo consecutive crests or troughsall of them318the speed of a periodic wave can be found indirectly from itsfrequency of S.H.Mwavelengthfrequency and wavelengthnone of them318as a wave progresses, each point in the medium oscillates with thesmaller frequency and same period of the sourcesame frequency and same period of the sourcesame frequency and smaller period of the sourceall of them318the profile of periodic waves generated by a source executing SHM is represented by atangent cuvesine curvecosine curvenone of them218the particles of the medium, as the wave passes through it are in phase with each other ifthey are at the same distance from equilibrium position.they are moving in the same directionboth of themany one of them318the longitudinal wave produced in a spring is also called atransverse wavese.m.waveripple wavecompressional wave418the regions of the spring in which spring is stretched more than its normal position are calledcompressionsrarefactionstroughscrests218The regions of the spring in which spring is compressed more than its normal position is calledcompressionsrarefactionstroughscrests118In a compressional wave, the particles of the medium in the path of the wave move.perpendicular to the directio of propagation of waveopposite to the direction of propagatio nof wavealong the direction of propagatio of waveany one of them319In case of a point source, the shape of the wavefront isstraightellipticalovalspherical419a line normal to the wavefront including the direction of motion is calledperpendicular lineparallel linea ray of lightnone of them319the waves propagate in space by the motion of thewavelengthsfrequencieswavefrontsnone of them319a limited region taken on a wavefront which is far away form the source asplane wavefrontcircular wavefrontspherical wavefrontelliptical wavefront119the light from Sun reached earth in the form ofplane wavefrontcircular wavefrontspherical wavefrontelliptical wavefront119In the study of interference and diffraction, we considerplane wavesplane wavefrontsboth of themnone of them319Usual way to obtain a plane wave is to place point source of light at the focus of aconcave lensconvex lensboth of themeither of them219By which principle we can locate the position of new wavefront after a later timeprinciple of irreversibilityprincipal of lightarchimedes principlehyugen's principle419According to huygen's, every point of a wavefront may be considered as a source ofprimary waveletssecondary waveletseither of themboth of them219According to huygen's principle, the new position of the wavefront after a time can be found by constructing a surface that touches all theprimary waveletssecondary waveletseither of themnone of them219The wave nature of light was first proposed byHuygenthomas youngnewtoncompton119Huygen's principle is used to study theformation of waverfrontspropagation of wavefrontsnature of lightspeed of light219According to the huygen's principle, the secondary wavelets propagate in the forward direction with a speed equal tospeed of wave motionspeed of mediumspeed of electronsspeed of proton119The medium in which speed of light is the same in all directions is callednon-homogeneous mediumhomogeneous mediumboth of themempty medium219When two lights waves traveling the same direction are in phase at any point, they produceconstructive interferencedestructive interferencedespersionpolarization119When the light waves of the same frequency and amp;itude travelling in the same direction are superimposed each other, they give rise tointerferencediffractiondispersionpolarization119When two light waves travelling in the same direction are out of phase at any point, their resultant amplitudeincreasesdecreasesremains unchangedincrease rapidly219Light waves produce interference whensources are monochromaticsources are phase conherentsources are close togetherall of them419A monochromatic source of light gives light ofone colourtwo coloursseven coloursfour colurs1110As the object is brought from a far off point to the focus, the magnificationgoes on decreasinggoes on increasingremains the sameany one of them1110The closer the object to the eye, thegreater is the angle subtended at the eyesamaller is the angle subtended at the eyeno effect on the anglenone of them1110When the object is placed at the near point, the eye sees the size of the objectmaximumminimumeither of themneither of them1110When the object is placed inside the near point, the details of the object arevisibleclearly visiblenot visibleall of them3110The ratio of the angles subtended by the image as seen through the optical device to that subtended by the object at the unaided eye is calledmagnifying powerangular magnificationnone of themboth of them4110On a microscope or a telescope which thing tells us that how close together the two point sources of light can be, so that they are still seen as two separate sourcesmagnificationlinear magnificationoptical magnificationoptical resolution4110The ability of an instrument to reveal the minor details of the object under examination is calledmagnificationoptical magnificationresolving powernone of them3110The minimum angle which two point sources subtends at the instrument so that their images are seen as two distinct spots of light rather than one is expressedmagnificationoptical magnificationresolving powerall of them3110The lens which can be used to help the eye to see small objects distinctly isconvex lensconcave lenseither of themnone of them3110A watch maker uses which lens to mend the watchesconvex lensconcave lenseither of themnone of them1110When the object is placed inside the focal point of the convex lens, the image formed will bemagnified and realmagnified and virtualdiminished and realdiminished and virtual2110For a lens of higher angular magnification the focal length should besmalllargevery large viscositynone of them1110for a simple microscope, the focal length is 5 cm and the distance of the object to the eye is 25 cm, then the magnifications is51015251110Whenever high magnification is desired, we will usesimple microscopecompound microscopeany of themnone of them2110The compound microscope consists ofone convex lenstwo convex lensesone concavelenstwo concave lenses2110In a compound microscope, the focal lehngth of object lens isvery largelargeshortvery short4110The object of height 'h' is placed in a compound microscopeat the principle focus of objectiveat the principle focus of eye-piecejust beyond the principle focus of the objectivejust beyond the principle focus of eye-piece3110The objective of the compound microscope produces areal and magnified imagereal and diminished imagevitual and magnified imageviertual and diminished image1110The objective of the compound microscope formed the imageat the focus of the eye-piecejust beyond the focus of eye-pieceinside the focus of the eye-pieceat the focus of objective3110In a compound microscope, the eye-piece is positioned so that the final image is formed at thefor point of eyeobjectivefocus of objectivenear point of eye4111The pressure exerted by the gas isdirectly proportional to the P.E.inversely proportional to the P.E.inversely proportional to the K.E.directly proportional to the k.E4111The ideal Gass law isP=nRTV=nRTPV=RTPV=nRT4111The absolute temperature for an ideal gas isdirectly proportional to the rotational K.E. olf gas molecules.directly proportional to the vibrational K.E. of gas moleculesdirectly proportional to the average translational K.E. of gas moleculesdirectly proportional to the P.E. of gas molecules.3111Internal energy is the sum of all the forms ofK.E.P.E.both of themnone of them3111In the study of thermodynamics, which gas is considered as the working substancereal gasideal gasany gas may be ideal or realnone of them2111The internal energy of an ideal gas system is generally thetranslational K.E. of moleculesvibrational K.E. of moleculesrotional K.E. of moleculesall of them1111When two objects are rubbed toghther, their internal energyremains the samedecreasesremains the same then decreasesincreases4111In thermodynamics, internal energy is the function oftemperaturepressurestatenone of them3111The internal energy of a system does not depend upon theinitial state of the systemfinal state of the systempathnone of them3111The work done by the system on its environment is considered aspositivenegativezeroany one of them1111The work done on the system by the environment is considered aspositivenegativezeroany one of them2111If an amount of heat Q enters the system it coulddecrease the internal energynot change the internalenergyincrease the internal energynone of them3111We can express the work in terms ofdirectly measurable variablesindirectly measurable variableseither of themboth of them3111A diatomic gas molecule hastranslational energyrotational energyvibrational energyhas both A and C4111A bicycle pump provides a good example offirst law of thermodynamicssecond law of thermodynamicsthird law of thermodynamicsnone of them1111If 42 J heat is transferred to the system and the work done by the systeme is32 J then what will be the change in internal energy0J2J5J10J4111the process which is carried out at constant temperature is known asadiabatic processisothermal processisochoric processnone of them2111In which process the conditin for the application of Boyle's law on the gas is fulfilledisochoric processadiabatic processisothermal processnone of them3111In case of an ideal gas, the P.E. associated with its molecule ismaximum speedzerominimumnot fixed2111A process in which no heat enters or leaves the system is calledisochoric processisothermal processadiabatic processnone of them3112SI unit of time period isampereSecondscaloriejoule2112The value of coulomb's constant 'K' depend uponthe system of unit usedmedium between the chargesquantity of chargesthe systeme of units and the medium between the charges4112the distance between the two charged bodies is halved, the force between them becomesdoublehalffour timesone half3112If the distance between the two charged bodies is doubled, the electric force between them will becomefour timestwicehalfone fourth4112Force is ascalarquantityvector quantityconstantvariable velocity2112The SI unit of force isjoulepoundwattNewton4112A metallic conductor conducts electricity because it contains freeprotonselectronsionsdipoles2112The value of relative permittivity ?r, in vacuum is1.621non of above4112A substance which does not contain free electrons, is calledinsulatorconductorsemiconductornone of these1112The value of relative permittivity r for different insulator is alwaysgreater than unityless than unityslightly less than unitynone of these1112the concept of electric field theory was introduced byKeplerNewtonDaltonMichael Faraday4112The concept of electric field theory was introduced in1791-18671731-18091809-18571800-18601112The force per unit charge is known aselectric fluxelectric voltelectric potentialelectric intensity4112The SI unit of electric field intensity isCoulombNewton / CoulombAmpereVolt2112An example of vector quantity isWorkEleectric field intensityspeed of electronsMass2112Which is a vector quantity?Electric chargeelectric potential differenceElectric engergyelectric field4112the electric field at a point inspace is equal in magnitude ofthe potential charge therethe electric charge therethe force of an electron would experience therethe force on a charge of one coulomb would experience there4112The unit N/C of electric field intensity is equivalent toVolt/mWeber/mApere/mWat/m1112One volt is1N/C1dyne/C1 Watt/c1 J/C4112Electric field is ascalarvectorconstantvariable velocity2112The test charge is always a unitpositive chargenegative chargesnutralnone of these1112Electric field lines originate from positive charges topositive chargesnegative chargestest chargesnone of these2113The SI unit of current iswattcoulombvoltampere4113The charge carriers in electrolyte are positive and negativeprotonselectrons to moleculesionsnone of these3113The charge carriers in gases areelectronsionsprotonsions and electorns4113The conventional current in a circuit is defined as "current which passes from a point at higher potential to a point at a lower potential as if it represents a movement of:negative chargespositive chargesprotonselectrons revolving sound the nucleus2113The speed of randomly moving electrons depends uponpressurevolumetemperatureMass3113The potential difference across the conductors should be mantained constant by conectng the ends of wire to the terminals of a device called a source ofpowercurrentresistancetemperature2113Solar cell converts sunlight directly intopotential energythermal energymechanical energyelectrical energy4113Eelctric generators which convert mechanical energy intosolar energythrmal eneregykinetic eneregyelectrical energy4113The liquid which conduct current is known asheating effectchemicial energyelectroyteohm's law3113the material in the form of wire or rod or plate which leads the current into or out of the electrolyte is known asvoltmetersresistanceelectrodecurrent3113The electrode connected with the positive terminal of the current soure is calledcathodeanodeelectrolyteposition2113The electrode connected with the negative terminal of the current source is calledanodeelectroytecathodeatoms3113Ohm's law state thatThe current throught a resistor is directly proportional to the applied voltageThe voltage across a resistor is directrly proportional to the current passing throught itResistance is the constant of proportionality betweeen the voltgage and currentall of these4113If one volt is needed to cause a current of one ampere to flow in a conductorits resistance isone ohmone jouleone voltone ampere1113The graphical representation of ohm's law ishyperbolastraight lineellipseparabola2113Ohm is the unit ofcurrentcapacitanceenergyresistance4113The relation V=IR representsAmpere lawFaraday's lawOhm's lawLen's law3113The ohm's is defined as1 ampere/ 1 volts1 coulomb / 1 volt1 volt/ 1 ampere1 volt/ 1 coulomb3113Ohm established a relation betweenvoltage and resistancevoltage and chargevoltage and currentvoltage resistance and charge3113If we plot a graph between potential difference (V) and current (I) obeying ohm's law, it will give usparabolastraight linehyperbolaellipse2114A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor isminimum speedmaximumzeronone of these2114a current carrying straight conductor is placed in a magnetic field perpendicular to it. The force experienced by the conductorF=0F=BIL cosF=BILF=DIL sin3114K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?O10.5-12114a current carrying straight conductor is placed in a magnetic field parallel to it. The force experienced by the conductor isF=0F=BIL sinF=BILF=BIL cos1114the force acting on a charge moving in a magnetic fieldis perpendicular to the both magnetic field and direction of motionis proportional to the magnetic of chargesvanishes when the motion is directly opposite to the direction of fieldall of the above4114Gauss (G) is smaller unit of magnetic induction which is related to tesla (T) asIT=10-4 GIT=106GIT=103GIT =104G4114the force acting as one meter length of the conductor placed at right angle to the magnetic field, when one a current is passing through it, defines themagnetic fluxmagnetic inductionmagnetic fieldself inductances2114A 5 meter wire carrying a current of 2A is at right angles to the uniform magnetic field of 0.5 Weber/m2. The force on the wire5N4N1.5N6N1114a relationship between gauss of magnetic induction and Tesla (T) is given byG10-3TG=10-2TG=10-4TG=10-1T3114the SI unit of magnetic induction isgaussteslaweberweber 22114the force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given byF=IB/LF=LxB/IF=ILxBF=IL.B3114if current through conductor is 1 A and length of conductor is 1m placed at right angle to the magnetic field, then the strength of magnetic field isF=B2F=0F=BF=B/23114weber is a unit ofmagnetic fluxmagnetic filed intensitymagnetic inductionmagnetic flux density1114the unit of magnetic flux isweber -m3weber-m3Henryweber4114the total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is calledmagnetic fluxmagnetic flux densitymagnetic inductionmagnetic field intensity1114the SI unit of flux density isnewton/amp-meterNewton-m/AmpereNewton-m/Amp2Newton-Amp/Meter1114the SI unit of flux density isteslaweberGaunweber/meter1115magnetic field do not interact withstationary electric chargesmoving electric chargesstationary permanent magnetmoving permanent magnet1115Electromotive force is most closely related tomagnetic flux densityelectric field intensityinductancepotential difference4115an induced emf is produced in a circuit whenno magnetic flux producedmagnetic flux remain constantmagnetic flux changenone of these3115when a magnet moves away from the coil, a current is again induced in thesame directionboth the directionssame direction but of high magnitudeopposite direction4115current can be induced in a coil by changing the area of the coil, magnetic field isnon uniformconstant fieldzeronone of these2115the emf induced by the motion of a coductor across a magnetic field is calledinduced emfmagnetic emfinduced currentmotional emf4115the emf of a moving conductor behave as aresistanceinsulatorbatterynon insulator3115the motional emf generated in a conductor is directly proportional to thevelocity of conductorstrength of magnetic fieldlength of conductorall of the above4115the experiments show that whenever there is a change in the magnetic flux linked with a loop or closed circuit there is alwaysa charge inducedan emf inducedinductance inducedcapacitance induced2115inductance is measured inhenryvoltage and chargeOhm's lawweber1115the motional emf 'vBi Sin developed in a conductor depends uponorientation of the conductormagnetic field and velocity of conductorlength of the conductorall of the above4115in the equation if motional emf, if the conductor is at rest, then motional emf isstrongly eevelopednot strongly eevelopedzeronone of these3115the average emf induced in a conducting coil of N loop is equal to negative of the rate at which the magnetic flux through the coil is changing with time is known asOhm lawFaraday's lawCoulomb's LawGauss's law2115according to Faraday's law the total charge induced in a conductor that is moved in magnetic field depend uponchange in magnetic fluxfinal magnetic fluxinitial magnetic fluxrate of change of magnetic flux4115Lenz's law predictsthe direction of induced emfthe magnitude of induced currentthe directio of induced currentthe magnitude of induced emf1115a metallic ring is placed on a table, and north pole of a magnet is brought near it. The directio of emf induced in the ring will depend uponlength of magneticdirection of motion of magnetspeed of magnetpole strength2115lenz's law introdued byRussia physicistchines mathematicianfrench chemistnone of these1115russian physicist heinrich Lenz gave lenz's law19001834182418742116the main reason for the word wide use of A.C. is that it can be transmitted to long distanceeasily and at a high costeasily and at a very low costat a very high costwith a great difficulty but at very low cost2116alternating current is that which is produced by a voltage source whose polarityremains the samekeeps on reversingdoes not changenone of them2116the time interval T during which the voltage source changes its polarity once is known asfrequency of S.H.Mtotal timetime periodtime constant3116the wave form of alternating voltage is acosine curvetangent curvesine curvenone of them3116the wave form of alternating voltage is curve or graph betweenvoltage and currentvoltage and timecurrent and timeall of them2117there is a regular arrangement of molecules in aamorphous solidspolymeric solidscrystalline solidsnone of these3117there is no regular arrangement of molecules in aamorphous solidspolymeric solidscrystalline solidsnone of them1117the solids which has structure in between order and disorder are calledamorphous solidspolymeric solidscrystalline solidsall of them2117the neighbours of every molecule in cyrstalline solids are arranged inan irregular mannera regular mannerany mannernone of them2117the vast majority of solids are in the form ofamorphous structurepolymeric structurecrystalline structureall of them3117the molecules or ions in a crystalline solids arestaticnot staticrandomly movingall of them2117the amplitude of oscillation of each atom in a metallic crystal rises with therise in temperaturedecrease in temperatureeven temperature remains constantall of them1117in metallic crystals which of the following thing remains constantamplitude of oscillationstemperature of solidaverage atomic positionsall fo them3117the cohesive forces between atoms, molecules or ions in cyrstalline solids maintain the strictshort range orderlong range orderboth of themnone of them2117every crystalline solis hasdefinite melting pointdifferent melting pointsmay or may not be definitenone of them1117amorphous solids are more likecrystalline solidsgasesliquidsany one of them3117amorphous solids are also called ascrystalline solidspolymeric solidsglassy solidsany one of them3117glass is an example ofcrystalline solidsamorphous solidpolymeric solidnone of them2117synthetic materials fall into the category ofcrystalline solidsamorphous solidpolymeric solidsall of them3117polymeric solids havelow specific gravityhigh specific gravityeither of themnone of tehm1117the smallest three dimesnional basic structure in a crystalline solid is calledlattice pointcrystal latticecubic crystalunit cell2117the crystalline structure of NaCI isrectangularhexagonaltetrahedralcubical2117the ability of the body to return to tis original shape is calleddeformationstretchingcompressingelasticity4117the results of mechanical tests are usually expressed in terms ofstressstrainstress and strainneither stress nor strain3117the force applied on unit area to produce any change in the shape, volume or length of a body is known asstrainelasticitystretchingstress4117when a stress changes length, it is called thecompressional stresstensile stressshare stressany one of them2117when a stress changes the volume, it is called thecompressional stresstensile stressshear stressany one of them1118a p-n junction is formed when a crystal of silicon is grown in such a way that its one half is doped with trivalent impurity and the other hand with a impurity from2nd groupfourth groupfifth groupsixth group3118in n-region of pn-junction, the majority charge carriers areholeselectrons to moleculesboth of themnone of them2118in p-region of pn-junction, the majority charge carriers areholeselectrons to moleculeseither of themnone of them1118whenever a pn-junction is formed, a chargeless regionis formed around the junction, which is called asp-regionn-regionfree regiondepletion region4118the value of the potential difference across the depletion region for the case of silicon is0.3 v0.5 v0.7 v0.9 v3118when the +ve terminal of the battery is connected with p-type and -ve terminal with the n-type regio of pn-junction, then the pn-junction isreversed biasedforward biasedeither of themnone of them2118when the +ve terminal of the battery is connected the n-type and -ve terminal with the p-type region of pn-junction, then the pn-junction isreversed biasedforward biasedeither of themnone of them1118when the pn-junction is forward biased its resistance is of the order offew mega ohmsfew killo ohmsfew ohmsfew milli ohms3118when the pn-junction is reversed biased, the current flows through it is of the order ofmili amperesamperesnano amperesmicro amperes4118when the pn-junction is forward biased, the current flows through it is of the order ofmili amperesamperesnano amperesmicro amperes1118when the pn-junction is in forward biased, current flows through the junction due to themajority carriersminority carrierseither of themnone of them1118when the pn-junction is in reversed biased, current flows through the junction due to themajority carriersminority carrierseither of themnone of them2118when the pn-junction is connected reversed biased, its resistance is of the order offew ohmsfew kilo ohmsfew mega ohmsfew mili ohms3118a diode characteristic curve is a plot betweencurrent and timevoltage and timevoltage and currentforward voltage and reversed voltage3118conversion of alternating current into direct current is calledamplificationrectificationconductinopolarization2118in half wave rectification, the number of diode used is / areonetwothreefoure1118the output voltage of half wave rectificatio is in the form ofa motth curvea smooth wavepulsesall of the above3118during the positive half cycle in the half wave rectification, the diodedoes not conductconductseither of theseneither of these2118during the negative half cycle of the half wave rectification, the diodedoes not conductconductseither of thesenone of these1118in half wave rectification,both halves of the input voltage is usedonly one half of the input voltage is usedeither of thesenone of these2119the concept of direction and position are purelyabsoluterelativeabsolute or relativenone of these2119absolute motion cannot be detectedin its own frame of referencesin a different frame of referencesboth in its frame and different frame of referencesnone of these1119an inertial frame of reference is a frame of reference which isat restmoving with uniform velocityeither at rest or moving with uniform velocitynone of these3119which of the followign is not an example of inertial framea body placed on the surface of eartha body placed in a car moving with uniform velocitya body placed in a car moving with some accelerationnone of these3119the special theory of relativity treats problems involvinginertial frame of referencesaccelerating frame of referencesboth of thesenone of these1119the general theory of relativity treats problems involvinginertial frame of referencesaccelerating frame of referencesboth of thesenone of these2119the special theory of relativity is based on theone postulatetwo postulatesthree postulatesfour postulates2119which of the followig is not a postulate of special theory of relativitylaws of physics are the same in all inertial framesspeed of light in free space has the different value for all observersspeed of light in free space has the same value for all observersall of these are postulates of special theorty of relativity2119according to the special theory of relaivity, time isabsolute quantitynot absolute quantityconstant quantitynone of these2119the speed of a pendulum is measured to be 3.0 s in the inertial reference frame of the pendulum. What is its period measured by an observer moving at a speed of 0.95 c with respect to the pendulum2.9 s3.0 s6.6 s9.6 s4119the length contraction happens onlyopposite to the direction of motionalong the direction of motionperpendicular to the direction of motionin any direction2119if you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appearslargershorterequalnone of these2119a bar 1.0 m in length and located along x-axis moves with a speed of 0.75 c with respect to a stationary observer. The length of the bar as measured by the stationary observer is1.66 m1.0 m0.66 m2.66 m3119if a body reaches a speed equal to the speed of light, then tis mass will becamezerovery smallinfinitynone of these3119according to the special theory of relaivity,mass and energy are same entitiesmass and energy are same entities but interconveriblemass and energy are different entities but interconvertiblemass and energy are different entities but non interconvertible3119the location and speed anywhere on earth can now be determined using relativists effects by NAVISTAR to an accuracy of2 cm/s20 cm/s200 cm/s2000 cm/s1119Newton's laws of motion do not hold inan accelerated frame of referencean unaccelerated frame of refeenceboth of thesenone of these1119accordign to the special theory of relativity, a moving clockruns fasterruns slowerneither runs faster nor slowerall of these2119at the temperature, a body emits radiation which is principallyof long wavelengths and in the visible regionof long wavelengths in the invisible infrared regionof short wavelengths in invisible ultraviolet regionnone of these2119at high temperature, the proportion of shorter wavelength radiation, emitted by the bodydecreasesfirst increases then decreasesincreasesany one of them3120the branch of physics which deals with the wavelength and intensities of electromagnetic radiation emitted or absorbed by atoms is callednuclear physicssolid state physicsspectroscopyparticle physics3120how many types of spectra presenttwothreeonenone of these2120black body radiation spectrum is an example ofband spectracontinuous spectraline spectradiscrete spectra2120molecular spectra are the example ofband spectracontinuous spectraline spectranone of these1120atomic spectra are the example ofband spectracontinuous spectraline or discrete spectranone of these3120the spectral series was identified bycomptoneinsteinrutherfardj.j. balmer4120the "spectral series" was identified in18851890198519001120balmer series has the historical importance because itLies in the far-ultraviolet regionlies in the infra-red regionlies in the visible regionlies in the far-infra red region3120Which one of the followng various series of hydrogen spectrum lies in the ultra-violet regionBalmer seriesBracket SeriesPaschen seriesLymann series4120Which of the following is one of the spectral series of atomic hydrogen?Balmer seriesBracket seriesPfund seriesall of the above4120Which of the following series of hydrogen spectrun lies in the infrared region?Paschen series, Bracket series, Lyman seriesPaschen series, Bracket series Pfund seriesPaschen series Pfund series, Lymann seriesPaschen series and Pfund series2120When electron inhydrogen atom jumps from higher orbit to first orbit, the set of lines emitted is calledBracket seriesPfund seriesPaschen seriesLyman series4120When electron in hydrogen atom jumps from higher orbit to third orbit, the set of lines emitted is calledBalmer seriesBracket seriesLyman seriesPaschen series and Pfund series4120When electron in hydrogen atom jumps torm higher orbit to fifth orbit, the set of lines emitted is called.Pfund seriesPaschen series, Bracket series Pfund seriesLyman seriesBracket series1120Lyman series is obtained when electron in hydrogen atom jumps from higher to lower orbit, where 'n' is equel to12341120The Balmer series lies inultraviolet regioninfrared regionfar infrared regionvisible region4120According to Bohr's atomic model, the energy is radiated in the form of a photon by an atom, wheneverone of its electron speed up in its orbitone one of its electron speed down in into orbitone of its electron jumps from a higher energy orbit to lower energy orbitone of its electron jumps from a lower energy to a higher energy orbit3120According to the Bohr's theorythe orbits are amost allepticalthe angular momentum of electron is an integral multiple of h/2nthe energy of the electron remain constant in all the orbitsnone of these2120According to the Bohr's atomic model, the electron does not fall into the nucleus becausethe electrostate attraction is balanced by mechanical forcethe electron is not a particlethe quantum rules do no allow itit has negative charge1120If an electron jumps form lower to higher orbit, it willabsorb energyemit energyabsorb as well as emit eneregyneither emit nor absorb1121Proton was discovered by Rutherford in19151906191019204121Neutron was discovered in19151920192519324121Neutron was discovered byCurieRoentgenChadwickRutherford3121Proton was discovered by Rutherford inRutherfodCurieRoentgenChadwick1121In 1932 chadwick discoveredprotonsneutronphotonelectron2121A particle having the mass of electron and charge of a proton is called aphotonpositronantiprotonantineutrino2121The chemical behaviour of an atom is determined bybinding energyatomic numbermass numbernumber of isotopes2121According to Rutherford atomic model, the positive charge in an atomis concentrated at its centreis in the form of psotive electron at same distance from its centreis spread uniformly through its volumenone of these1121For an atom having atomic number 'Z' and atomic weight 'A' the number of neutrons in the nucleus isA-ZAZA+Z1121The number of protons inside a nucleus is calledmass numberatomic weightatomic numbernone of these3121For an atom having atomic number Z and atomic weight A, the charge on the nucleus isA-ZA+ZZA3121For an atom having atomic number Z and atomic weight A, the number of electron in an atomsA-ZA+ZZA3121Structure of the nucleus was explained byJ.J. ThomsonBohrMillikanRutherford4121Neutrons arepositive chargenegatively chargedmasslessneutral4121Electrons arepositive chargednegatively chargedmasslessneutral2121Nuclei that have the same chrge number but different mass number are calledisotonesisomersisotopesisobars3121How many isotopes of helium are present?12342121Hydrogen atom with only one proton is its nucleus, and one electron in its orbit is calleddeuterondeuteriumprotiumtritium1121Hydrogen atom with only one proton and two neutrons is its nucleus and one electron is calledprotiumdeuteriumdeuterontritium4121The chemical properties of all the isotopes of an elements aresame directiondifferent melting pointsslightly differentnone of these112Scalar is a physical quantity which is completely described by aNumber onlyDirection onlyNumber with proper unitsNumber with direction312Which one of the following is a scalarVelocityAccelerationForceTime412A vector is a physical quantity which is completely described byMagnitude and directionMagnitude onlyDirection onlyA number only112All the following ar vectors EXCEPTImpulseMomentumTorqueDensity412A vector whose magnitude is one is calledNull vectorUnit vectorPosition vectorPositive212Unit vector is used to specifyMagnitude of a vectorDimension of a vectorDirection of a vectorPosition of a vector312A vector having magnitude equal to given vector but in opposite derection is calledUnit vectorPositive vectorNegative vectorPosition vector312Null vector is a vector having zero magnitude andNo directionSpecific directionArbitrary directionNone of the above312When two equal and opposite vectors are added then their resultant will haveSame magnitudeDouble magnitudeZero magnitudeHalf magnitude312The product ixi is equal to21-10412The product ixj is equal toZero1k- k312If A = 3i + 4j, then IAI will be75251212A vector product isCommutativeAssociativeAdditiveSubtractive213The magnitude of the displacement is a line form initial position to final position which isstraightcurvedeither straight or curvednone of them113the displacement coincides with the path of the motion when a body moves in acurved linestraight linemay be curved or straightnone of them213velocity is aScalar quantitiesvector quantityconstant quantitynon of them213Dimensions of velocity are[L][T][LT-1][LT-2]313when we consider the average velocity of a body, then the body is moving instraight linecurved pathmay be in a straight or curved pathnone of them313if a ball comes back to its starting point after bouncing off the wall several times, then itstotal displacements is zeroaverage velocity is zeronone of themboth of them413The instantaneous velocity is define as the limiting value of d/t on the time interval t approaches tozeromaximumminimuminfinity113if the instantaneous velocity of a body does not change, the body is said to be moving withaverage velocityuniform velocityinstantaneous velocityvariable velocity213The time rate of change of velocity is known asdisplacementdistancevelocityacceleration413acceleration is ascalar quantityimaginary quantityvectorfixed quantity313velocity of a body changes ifdirection of the body changesspeed of the body changesneither speed nor direction changes,either speed or direction changes413the direction of the acceleration is the same as that ofspeedvelocityboth of themnone of them213acceleratio of a body at any particular instant during its motion is known asaverage accelerationuniform accelerationinstantaneous accelerationall of them313If the velocity of a body changes by equal amount in equal intervals of time, the body is said to haveaccelerationuniform acceleratininstantaneous accelerationuniform velocity413when a body is moving with uniform acceleration, its average acceleration isless than instantaneous accelerationgreater than instantaneous accelerationequal to instantaneous acceleraitonmay be all of them313The distance travelled by a body in one second is calledspeedvelocityaccelerationaverage velocity114If the angle 0 between the force and displacement is less than 90, then the work done will bepositivenegativezeromaximum114If the angle 0 between the force and displacement is equal to 90, then the work done will bepositivenegativezeromaximum314If the angle 0 between the force and displacement is grater then 90, then the work done will bepositivenegativezeromaximum214If the displacement occurs in the direction of force, then the work done will bepositivenegativezeromaximum414the SI Unit of work isN-sN-m2N-mN-m-2314in which of the following, force does not remain constant during the process of doing work (I) a rocket moves away form earth (ii) work done against the force of gravity (iii) force exerted on the spring(I) only(I) and (ii) only(I),(ii) and (iii) only(d) none of them314A force of 5N applied on a body and the body moves 4.5 meters in the direction of applied force, then the work donw will be20 N22.5 N20J22.5 J414The space around the earth in which its gravitational force acts on a body is calledMagnetic fieldelectric fieldelectromanetic fieldgravitational field414In the gravitational field, the work done will be negative, ifthe displacement is in the directin of gravitational forcethe displacements is against the gravitational forcethe displacemetn is perpendicular to the gravitational forcethe displacement is zero214In the gravitational field, the work done will be positive, ifthe displacement is in the direction of gravitational fonrcethe displacements is against the gravitaiotnal forcethe displacement is perpendicular to the gravitational forcethe displacement is zero114The gravitational field isnon-conservatiove filedconservative fieldconstant fieldall of them214work done in Earth's gravitational field isindependent of the path followeddependent of the path followedboth of themneither of them114the field in which the work done is independent of the path followed or work done in a closed path is zero is called avariable fieldconstant fieldnon conservative fieldconserrvative field414What is the correct definition of power ?Doing workthe rate of doing workAmount of workchange in energy214The unit of power is MKS system of units isWattJouleErgElectron volts114In British Engineering system of units, one horse power is equal to742 watts746 watts750 watts754 watts214Work energy principle implies that the work done by the applied force isEqual to change in K.EGreater than the change in K.ELess than the change in K.EEqual to P.E114The minimum initial velocity required to take a body out of earth gravitational field is known asVariable velocityInstantaneous velocityEscape velocityAngular velocity314The Energy released in fission reaction isTidal energySolar energyWind energyNuclear energy415Motion of a body is called two dimensional if it hasOnly x-componenetx and y componentNo ComponentOnly y- component215The path of a projectile is determened byGravitational forceMagnetic ForceElectric forceElectromagnetic force115In projecile motion, the horizontal component of velocityRemains constantChangesIncreasesDecreases115When a projectile moves upwards, its vertical component of velocityRemains constantDecreasesIncreasesDecomes equal to horizontal velocity215In a projectile motion, the body hasOne component of velocityTwo components of velocityThree components fo velocityFour components215The path of a projectile is determened byParabolicElliptiacalCircularHorizontal115At the highest point, a projectile has its vertical component of velocity equal toMaximumMinimumHorizontal component of velocityTotal velocity215In a projectile motion, the total time of flight isTwice the time to reach the highest pointThe time to reach the highest pointHalf the time to reach the heghest pointThreen times the time to reach the highest point115If we want to kill a monkey sitting on the tree we should aimA little above the monkeyStraight at the monkeyA little below the monkeyAt random115The motion of a body in a circle is calledRectilinear motionVibratory motionAngular motionElliptical motion312The physical quantity which produces angular acceleration in a body is calledforceCentripetal forceGravitational forceTorque412The turning effect of a force about a certain point is calledMomentumAngular momentumTorqueImpulse312Torque is the resultant ofDot product of force and moment armSimple product of force and moment armCross product of force and moment armAdditionof force and moment arm312When direction of both r and F are reversed thenTorque does not changeTorque changeMagnitude of torque changesDirectionof torque changes112Torque is aScalar quantityVector quantityQuantity which produces linear accelerationProduces no acceleration212Clock-wise torque is taken asPositiveNegativeNither +ve nor -veZero212The torque is also called asMoments of inertiaMoment of momentumMoment of forceQuantity of motion312In a couple, the resultant of two forces is2 FF2 / FZero212A couple acting on a body will onlyAccelerate the bodyVibrate the body about certain axisRotate the body about certain axisKeep the body stationary312Torque is the product between force andDistanceVelocityMoment armArm of the weight312The centre of gravity of an irregular shaped body lies atThe centre of the bodyThe axis of rotation of the bodyThe point of intersection of lines drawn vertically from various position of the bodyThe surface of the body312The centre of gravity of a cylinder is atThe centre of the top of the cylinderThe centre of the bottom of the cylinderA point on curved side of the cylinderThe mid-points of axis412The centre of gravity of a triangular plate is atOne end of the plateThe interectionof the mediansThe mid point of any side of the plateNone of the above212Angular momentum is defined asThe quantity of matter in a bodyThe quantity of motion in a bodyThe moment of force in a bodyThe moment of momentum in a body412The Rate of change of angular momentum of a body is equal toImpulsive forceApplied forceMoment of inertiaThe applied torque419The wave nature of light was verified byThomas youngHuygenNewtonMaxwell119Which one of the following properties of light does not depend upon the nature of the mediumVelocityWavelengthAmplitudeFrequency419Which one of the following properties prove the transverse nature of lightInterferenceDiffractionPolarizationRefraction319Which one of the following is nearly monochromaticLight from candleLight from simple lampLight from sodium lampLight from sun319Young's Double slit experiment can be used to determineWave length of monochromatic lightDistance between the slitsFringe spacingAll of the above419A thin layer of oil on the surface of water appears colored becouse ofInterference of wavesPolarizationReflectionRefraction119Michelson's Interferometer is usually used to determineWavelength of lightVelocity of lightFrequency of lightDispersion of light119A monochromatic light of wavelenght 500 nm is incident normally on a diffraction grating having 200 lines per millimeter, the maximum number of order visible on one side will be2015105319Which one of the following is used to measure the wave length of X-raysYoung's Double slit experimentDiffraction gratingBragg's LawPhoto electric effect319which one of the following properties is not found in both sound and lightInterference of wavesDiffractionPolarizationReflection319In monochromatic red light a blue book will appearBlueRedBlackPurple319Polaroids can be usedTo control head light glare in night drivingTo determine the concentration of optically active substanceIn curtain less window to adjust the amount of lightAll of them4110A refracting substance boinded by one or two spherical surfaces is calledMirrowPrismLensGlass3110A lens which is thicker in the middle and thinner at the edges is calledConcave lensConvex lensConvex-Concave lensPlano-concave lens2110A lens which diverges a beam of parallel rays of light is calledConvex lensConcave lensConvex-Concave lensPlano-concave lens2110A straight line passing through centers of curvature of the two spherical surfaces of a lens is calledDiameter of the lensRadius of the lensPrincipal axisPrincipal focus3110A point on the surface of the mirror where principal axis meets is calledFocusCentre of curvaturePoleAperture3110The centre of the lens through which a ray of light does not change its direction is knowns asOptical centreFocusCentre of curvatureAperture1110The diameter of a lens is calledPrincipal axisPrincipal focusApertureRadius of curvature3110The unit of power of lens isMeterWattHorsepowerDioptre1110Power of a lens is one dioptre if its focal length is1 meter2 meter1/2 meter1/4 meter1110when the object is placed at 2f of convex lens then the image formed behind the lens will beAt the focusAt 2fBeyond 2fBetween f and 2f2110when the object is placed at principal focus of a convex lens then the image is formed atSame distanceInfinitySame side of lensCentre of curvature2110A double convex lens acts as a diverging lens when the object is placedAt the focusAt 2fBetween f and 2fWithin the focal length4110If the focal length of an objective and eye-piece of a telescope are 5cm and 1cm respectively then its length will be8 cm4 cm6 cm5 cm3110If the size of the image is twice that of object thenq = 2pq = pq = p / 2q = 3p111041103110211Which one is not a branch of physical sciences?Chemistry AstronomyGeologyBiology411Which branch of science plays an important role in the development of technology and engineering?ChemistryPhysicsGeologyBiology211The number of categories in which physical quantities are divided are -----------OneTwoThreeFour211How many types of units are in SI?OneTwoThreefour311In scientific notation numbers are expressed in-----------Power of tenPowers of twoReciprocalDecimal111The error in measurement may occur due to--------------- Inexperience of a personThe faulty apparatusInappropriate methodDue to all reasons in a, b and c411The uncertainty in a measurement may occur due to------------- Limitation of an instrument Natural variation of the object to be measured Inadequate of technique All given in a, b and c411Random error can be reduced by ________________taking zero correctioncomparing the instrument with another more accurate onetaking mean of several measurement all methods explained in a, b and c311In any measurement the significant figures are_______________all accurately known and all doubtful digitonly accurately known digitsonly doubtful digitsall accurately known digits and the first doubtful digit411A digit zero in a measurement _______________may be significant may not significantalways significantalways insignificantsignificant only if left to a significant figure111Number of significant figures in 0.017 are ______________ three four five two111 Smaller the least count of the instrument more is the Measurement__________ accurate precise accurate and precise none of these211Dimensional analysis is helpful for ________________ deriving a possible formula checking the homogeneity of a physical equation verification of laws only a and b are correct411Three students measured length of a needle with meter rod and recorded as (i)0.2145m (ii) 0.21m (iii) 0.214 m Which one is correct record? only (i)only (ii) only (iii)both (i) and (ii)311Absolute uncertainty in a measurement depends upon_______________magnitude of the measurementleast count of the instrumentpercentage error in the measurementall of a, b and c311steradian is the SI unit of ________________Plane angleSolid angleBoth plane angle and solid angleNeither plane angle nor solid angle211An ideal standard of measurement of a base quantity has characteristics____________ accessible invariable transportable only a and b are correct411Total uncertainty, in result obtained from the subtraction of two measurements, is equal to-------------- Sum of their absolute uncertainties Difference of their absolute uncertainties Product of their absolute uncertaintiesDivision of their absolute uncertainties111Which one is the highest power multiple? Giga Beta Mega deca111The unit of force is------------ and its symbol is---------. Which is the correct pain? Newton,n Newton,N newton,n newton,N211 How many main frontiers of fundamental science? 1 2 3 4211Which one is the derived quantity in SI units?Electric current Electric chargePlane angle Amount of substance211Zero error of the instrument is a type of -------------Random errorPersonal errorSystematic errorClassified error311In multiplication and division of measurement------------Percentage uncertainties are addedAbsolute uncertainties are added Percentage uncertainties are dividedAbsolute uncertainties are divided111The Number of significant figures in 5.400 are Three Five TwoNone411 To reduce the uncertainty in the timing experiment Use highly precise instrument Conduct at room temperature Count more number of vibration Both a and c311The number of significant figures in the length of a bar 6200mm measured by meter rod are Four Three Two None of these2117A ferromagnetic will become fully magnetized atHigh voltage A.CLow voltage A.CAlternating current at its peak valueD.C current at peak value3117Coercive force is the force which opposes ____________DemagnetizationBreakageExtensionSurface cracking1117Materials in which valence electrons are tightly bound to their atoms at low temperature are called ____ _____Semi conductorSuper conductorsinsulatorsConductor3117The bulk properties of materials such as their mode of fracture, can be related to their ____________PolymerizationCleavageMicrostructureDislocation3117The angular position of cells remains the same for a sample of a crystal. This property is called _ _________IsotropyCleavageHomogeneityThe external symmetry of form4117The breaking of crystals along definite direction is called __________CleavageSymmetryIsotropyHomogeneity1117If the density of atoms remain same along any direction in a crystal is called ___________SymmetryHomogeneityIsotropyCleavage2117In simple cube, one atom or molecule lies at its _______Force cornersNine cornersEight cornersSix corners3117The band theory of solids explains satisfactorily the nature of _________Electrical insulators aloneElectrical conductors aloneElectrical semi conductors aloneAll of the above4117A vacant or partially filled band is called __________Conduction bandValence bandForbidden bandEmpty band1117A completely filled band is called _________Conduction bandValence bandForbidden bandCore band4117The electrons in conduction band are free to ___________Transport vibrationsTransport signalsTransport chargeTransport impulses3117Which one has the greatest energy gap?Semi conductorConductorMetalsNon metals4117Many of the semi conductors are crystals of the type ___________Face centred cubicBody centred cubicSimple cubicAll of the above1117With increase in temperature the electrical conductivity of intrinsic semi conductorDecreasesIncreasesRemains sameFirst increases then decreases2117Holes can exist in______________ConductorsInsulatorsSemi conductorsAll of the above3117On the basis of band theory of solids, the semiconductors have___________A partly filled valence band and totally empty conduction bandA completely filled valence band a totally empty conduction band and a very wide forbidden bandA completely filled valence band, a partially filled conduction band and a narrow forbidden bandA partly filled valence band, a totally empty conduction band and a wide forbidden band3117In a semiconductors, the charge carriers are____________Holes onlyElectrons onlyElectron and holes bothAll of the above3117The net charge on n-type material is ______________PositiveNegativeBoth positive and negativeNeutral4117Very weak magnetic fields are detected by___________SquidsMagnetic resonance imaging (MRI)MagnetometerOscilloscope11104110311031102111The pressure exerted by the geas isdirectly proportional to the P.E.inversely proportional to the P.E.inversely proportional to the K.E.directly proportional to the E.E1111The ideal gass law isP=nRTV=nRTPV=RTPV=nRT4111The absolute temperature for an ideal gas isdirectly proportional to the rotational K.E. olf gas molecules.directly proportional to the vibrational K.E. of gas moleculesdirectly proportional to the average translational K.E. of gas moleculesdirectly proportional to the P.E. of gas molecules.3111Internal energy is the sum of all the forms ofK.E.P.E.both of themnone of them3111In the study of thermodynamics, which gas is considered as the working substancereal gasideal gasany gas may be ideal or realnone of them2111The internal energy of an ideal gas system is generally thetranslational K.E. of moleculesvibrational K.E. of moleculesrotional K.E. of moleculesall of them1111When two objects are rubbed toghther, their internal energyremains the samedecreasesremains the same then decreasesincreases4111In thermodynamics, internal energy is the function oftemperaturepressurestatenone of them3111The internal energy of a system does not depend upon theinitial state of the systemfinal state of the systempathnone of them3111The work done by the system on its environment is considered aspositivenegativezeroany one of them1111The work done on the system by the environment is considered aspositivenegativezeroany one of them2111If an amount of heat Q enters the system it coulddecrease the internal energynot change the internalenergyincrease the internal energynone of them3111We can express the work in trms ofdirectly measurable variablesidirectly measurablevariableseither of themboth of them3111A diatomic gas molecule hastranslational energyrotational energyvibrational energyall of them1111A bicycle pump provides a good example offirst law of thermodynamicssecond law of thermodynamicsthird law of thermodynamicsnone of them1111If 42 J heat is transferred to the system and the work done by the systeme is32 J then what will be the change in internal energy0J2J5J10J4111the process which is carried out at constant temperature is known asadiabatic processisothermal processisochoric processnone of them2111In which process the conditin for the application of Boyle's law on the gas is fulfilledisochoric processadiabatic processisothermal processnone of them3111In case of an ideal gas, the P.E. associated with its molecule ismaximum speedzerominimumnot fixed2111A process in which no heat enters or leaves the system is calledisochoric processisothermal processadiabatic processnone of them3119the concept of direction and position are purelyabsoluterelativeabsolute or relativenone of these2119absolute motion cannot be detectedin its own frame of referencesin a different frame of referencesboth in its frame and different frame of referencesnone of these1119an inertial frame of reference is a frame of reference which isat restmoving with uniform velocityeither at rest or moving with uniform velocitynone of these3119which of the followign is not an example of inertial framea body placed on the surface of eartha body placed in a car moving with uniform velocitya body placed in a car moving with same accelerationnone of these3119the special theory of relativity treats problems involvinginertial frame of referencesaccelerating frame of referencesboth of thesenone of these1119the general theory of relativity treats problems involvinginertial frame of referencesaccelerating frame of referencesboth of thesenone of these2119the special theory of relativity is based on theone postulatetwo postulatesthree postulatesfour postulates2119which of the followig is not a postulate of special theory of relativitylaws of physics are the same inall inertial framesspeed of light in free space has the different value for al lobserversspeed of light in free space has the same value for all observersall of these are postulates of special theorty of relativity2119according to the special theory of relaivity, time isabsolute quantitynot absolute quantityconstant quantitynone of these2119the speed of a pendulum is measured to be 3.0 s in the inertial reference frame of the pendulum. What is its period measured by an observer moving at a speed of 0.95 c with respect to the pendulum2.9 s3.0 s6.6 s9.6 s4119the length contraction happens onlyopposite to the direction of motionalong the direction of motionperpendicular to the direction of motionin any direction2119if you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appearslargershorterequalnone of these2119a bar 1.0 m in length and located along x-axis moves with a speed of 0.75 c with respect to a stationary observer. The length of the bar as measured by the stationary observer is1.66 m1.0 m0.66 m2.66 m3119if a body reaches a speed equal to the speed of light, then tis mass will becamezerovery smallinfinitynone of these3119according to the special theory of relaivity, time ismass and energy are same entitiesmass and energy are same entities but interconveriblemass and energy are different entities but interconvertiblemass and energy are different entities but non interconvertible3119the location and speed anywhere on earth can now be determined using relativists effects by NAVISTAR to an accuracy of2 cm/s20 cm/s200 cm/s2000 cm/s1119Newton's laws of motion do not hold inan accelerated frame of referencean unaccelerated frame of refeenceboth of thesenone of these1119accordign to the special theory of relativity, a moving clockruns fasterruns slowerneither runs faster nor slowerall of these2119at the temerature, a body emits radiation which is principallyof long wavelengths and in the visible regionof long wavelengths in the invisible infrared regionof short wavelengths in invisible ultraviolet regionnone of these2119at high temperature, the proportion of shorter wavelength radiation, emitted by the bodydecreasesfirst increases then decreasesincreasesany one of them3120the branch of physics which deals with the wavelength and intensities of electromagnetic radiation emitted or absorbed by atoms is callednuclear physicssolid state physicsspectroscopyparticle physics3120how many types of spectra presenttwothreeonenone of these2120black body radiatio spectrum is an example ofband spectracontinuous spectraline spectradiscrete spectra2120molecular spectra are the example ofband spectracontinuous spectraline spectranone of these1120atomic spectra are the example ofband spectracontinuous spectraline or discrete spectranone of these3120the spectral series was identified bycomptoneinsteinrutherfardj.j. balner4120the "spectral series" was identified in18851890198519001120balmer series has the historical importance because itlies in the far-ultraviolet regionlies in the infra-red regionlies in the visible regionlies in the far-infra red region3120Which one of the followng various series of hydrogen spectrum lies in the ultra-violet regionBalmer seriesBracket SeriesPaschen seriesLymann series4120Which of the following is one of the spectral series of atomic hydrogen?Balmer seriesBracket seriesPfund seriesall of the above4120Which of the following series of hydrogen spectrun lies in the infrared region?Paschen series, Bracket series, Lyman seriesPaschen series, Bracket series Pfund seriesPaschen series Pfund series, Lymann seriesPaschen series and Pfund series2120When electron inhydrogen atom jumps from higher orbit to first orbit, the set of lines emitted is calledBracket seriesPfund seriesPaschen seriesLyman series4120When electron in hydrogen atom jumps from higher orbit to third orbit, the set of lines emitted is calledBalmer seriesBracket seriesLyman seriesPaschen series and Pfund series4120When electron in hydrogen atom jumps torm higher orbit to fifth orbit, the set of lines emitted is called.Pfund seriesPaschen series, Bracket series Pfund seriesLyman seriesBracket series1120Lyman series is obtained when electron in hydrogen atom jumps from higher to lower orbit, where 'n' is equel to12341120The Balmer series lies inultraviolet regioninfrared regionfar infrared regionvisible region2120According to Bohr's atomic model, the energy is radiated in the form of a photon by an atom, wheneverone of its electron speed up in its orbitone one of its electron speed down in into orbitone of its electron jumps from a higher energy orbit to lower energy orbitone of its electron jumps from a lower energy to a higher energy orbit3120According to the Bohr's theorythe orbits are amost allepticalthe angular momentum of electron is an integral multiple of h/2nthe energy of the electron remain constant in all the orbitsnone of these2120According to the Bohr's atomic model, the electron does not fall into the nucleus becausethe electrostate attraction is balanced by mechanical forcethe electron is not a particlethe quantum rules do no allow itit has negative charge1120I f an electron jumps form lower to higher orbit, it willabsorb energyemit energyabsorb as well as emit eneregyneither emit nor absorb1121Radiations emitted by unstable nuclei areHeatX-raysLightNuclear4121Charge on alpha particle is equal to the charge on the nucleus ofHydrogenHeliumLithiumBeryllium2121Alpha particles are highly ionizing because ofTwo protonsLow speedLow energyTwo neutrons1121Which one of the following are highly penetratingGamma raysBeta particlesAlpha ParticlesLight rays1121Solid state detector basically isA pnp transistorA npn transistorPN-junction diodeLight emitting diode3121Cancerous tissues in a thyroid gland can be detected by the intake ofRadio iodineRadio sodiumRadio carbonRadio phosphorus1121The tumors are irradiated byProtonsGamma raysBeta particlesAlpha particles2121Range of alpha particle in air is about50 cm40 cm7 cm5 cm3121Neutron penetrate matter readily and chiefly because they areNeutralEqual mass to protonSlow movingFast moving3121which one of the following is the most useful tracerStrontium - 90Carbon - 14Lodine - 131Cobalt - 60211The number 76.8 is rounded off up to two significant figures as 76.8 77 76.9 None of them212Rectangular coordinate system is also called----------------- Polar coordinate system Cartesian coordinate system Cylindrical coordinate system Spherical coordinate system212The direction of a vector in space is specified by------------ One angle Two angle Three angle No angle312Addition of vector obey-------------------- Commutative law Distributive law Associative law All given laws in a, b and c412A vector can be multiplied by a number. The number may be--------- dimensionless dimensional scalar negative all a, b and c are correct412Maximum number of rectangular components is------------- One Two Three Infinite312Maximum number of components of a vector may be---------- One Two ThreeInfinite412Which one is not correct for a vector A= 2 i + 2 j? Has direction =45o with x-axisHas magnitude 2 Has magnitude 2 and direction =45o with y-axis Has magnitude -2412Two vectors A and B are making angle with each other. The scalar projection of vector B on vector A is written as___________________A.B /AA.B/ B A. cos Both a and b are correct112The direction of vector product is given by_______________ Head to tail rule Right hand rule Left hand rule Triangular rule212If east, west, north, south, up and down are representing the direction of unit vector, then east x south has direction along______________West North Down Up312 Null vector is vector which has____________Zero magnitude No specified direction Both a and b are correct Both a and b are not correct312Zero magnitudeTheir dot productTheir cross productHead to tail ruleRight hand rule112Torque is defined as_______________Turning effect of force Cross product of position vector and force Product of force and moment armAll a, b and c are correct412SI unit of torque is_______________N.m JouleBoth a and b are correct Neither a nor b is correct112 Torque acting on a body determines___________AccelerationLinear accelerationAngular accelerationDirection of motion of the body312A body in equilibrium_________Always at restAlways in uniform motionMay be at rest or in uniform motionMay be at rest or in motion312Which one is not a type of dynamic equilibrium?Rotational equilibriumTranslational equilibriumStatic equilibriumBoth a and c are correct answer312Three coplanar forces acting on a body keep it in equilibrium. They should therefore be ___________________ConcurrentNon concurrentParallelNon parallel112Which of the following pairs does not have identical dimensionsTorque and energyMomentum and impulseEnergy and workMass and moment of inertia412A central force is that which_______________Can produce torqueCant produce torqueSome time can produce torque some time cantHas no relation with torque212It is easier to turn a steering wheel with both hands than with a single hand because_______________Accelerating force increases on the wheelTwo forces act on the wheelTwo hands provide firm gripCouple acts on the wheel413When body is in motion, ____________ always changes.its velocityits accelerationits position vectorits momentum313a body is moving in uniform velocity, its _________its speed changesacceleration changesdirection of motion changesdisplacement of origin changes413a man is in a car moving with the velocity of 36Km/hr. his speed with respect to the car is10m/s36m/sZeroinfinite313when velocity time graph is straight line parallel to time axis then___________acceleration is constantacceleration is variableacceleration is zerovelocity is zero313Area under velocity time graph represent____________forcedisplacementdistanceacceleration313Slope of velocity time graph is __________accelerationdistanceforcemomentum113Instantaneous and average velocities become equal when body__________has zero accelerationhas uniform accelerationhas variable accelerationmoves in a circle113Inertia of an object is quantitative measure of its___________volumedensitymassTemperature313Newton,s law do not hold good for particles_____________at restmoving slowlymoving with high velocitymove with velocity of light413Momentum depends upon ____________force acts on a bodymass of a bodyvelocity of a bodyboth mass and velocity of a body413When a body moves in a straight line then its displacement coincides withdistanceforceaccelerationboth A and B113Which of the following pair has same direction always?force, displacementforce , velocityforce, accelerationforce , momentum313Motorcycle safety helmet extends the time of collision hence decreasing the _________chance of collisionforce actingvelocityimpulse213the collision between two bodies of elastic if bodies are ______________solid and softsolid and elasticsolid and hardhard and elastic313During long jump, athlete runs before taking the jump. By doing so he __________provide him a larger inertiadecresing his inertiadecreses his momentumincreases his momentum113When car takes turn around a curve road, the passengers feel a force acting on them in a direction away from the center of the curve. It is due to_____________centripetal forcegravitational forcetheir inertiacentrifugal force313a body is falling freely under gravity. How much distance it falls during an interval of time between 1st and 2nd seconds of its motion, taking g=10?14 m20 m5 m25 m113What is the shape of velocity time graph of constant acceleration?straight inclined lineparabolainclined curvedeclined curve113When collision between the bodies in a system is inelastic in nature then for system_______________momentum changes but K.E remain conserveK.E changes but momentum remains conserveboth momentum and K.E changesboth momentum and K.E remain conserve213the acceleration in the rocket at any instant is proportional to the nth power of velocity of the expelled gases. Where the value of n must be ?-112-2213Which of the following is not an example of projectile motion.a gas filled balloonbullet fired from guna football kickeda base ball shot113What is the angle of projection for which the range and maximum height become equal?213the trust on the rocket in the absence of gravitational force of attraction is ___________constantnot constantconstant if the rate of ejected gases is constantconstant for short range rocket113Flight of rocket in the space is an example of_____________Second law of motionThird law of motionFirst law of motionlaw of gravitation213The trajectory or path of projectile is _________________straight lineparabolahyperbolacircle213Time rate of change of momentum is equal toforceimpulsevelocityboth A and C113Why ballistic missile fails in some circumstances of precision.due to their shapedue to air resistancedue to angle of projectionall of these414. A field in which the work done is moving a body along closed path is zer is called _______________electric fieldconservative fieldelectromagnetic fieldgravitational field214. when a force is parallel to the direction of motion of the body , then work done on the body is _____________zerominimuminfinitymaximum414. which of the following type of force can do not work on the practical on which it acts?frictional forcegravitational forceelastic