0's on right side of non-zero numbers are? A.Significant B.non-significant C.sometimes significant and sometimes D.none of these

Workspace2.

What is the magnification when the image of an object through convex lens is formed at its Focal length?

A.1B.1.5C.2D.2.5

Workspace3.

Maxima in young's experiment indicate?A.bright bands B.constructive interference C.dark bandsD.Both a and b

Workspace4.

how much heat a 100 watt bulb will generate in 1 hour?A.0 jouleB.60 jouleC.3600 jouleD.360000 joule

Workspace5.

If y-component of a force acting in y direction is 6N the x-component will beA.6NB.12NC.zero D.none of these

Workspace6.

Time seen from ground in clock of airplane? A.seems slower B.seems faster C.constant D.unpredictable

Workspace7.

Resistance of RCL series circuit at resonance is?A.Xc

B.R

C.Xl

D.Xl x R x Xc

Workspace8.

Power of RCL circuit at resonance is?A.zeroB.minimumC.maximumD.none of these

Workspace9.

an emf of 10 v is observed in one coil when the current is changing at the rate of 5 As^-1 in the other coil. What is the mutual inductance of the coil?

A.50HB.40HC.5H D.2H

Workspace10.an electron is placed between two charged plates the upper plate is positively charged and the

lower plate is negative charged. The electron will A.deflect downwardsB.deflect upwards C.go straightD.none of these

Workspace11.A spring clock is wound by a key. Which of following is true

A.neither elastic potential energy nor kinetic energy existsB.both elastic potential energy and kinetic energy existC.kinetic energy exists whereas there's no elastic potential energyD.elastic potential energy exists whereas there's no kinetic energy

Workspace12.Rate of change of momentum is

A.torque B.forceC.time D.none of these

Workspace13.If V=100 is applied to RLC series circuit. If 200 watt power is dissipated by passing 4A

current. Then in the capacitorA.Current leads by 90 B.Current lags by 90 C.Voltage lags by 60 D.Voltage leads by 60

Workspace14.For V=Vosint find period

A.pieB.2pieC.pie/2D.zero

Workspace15.In interference energy ___ destroyed

A.May beB.will beC.can beD.cannot be

Workspace16.Speed of sound is greatest in

A.glass B.waterC.woodD.plastic

Workspace17.Speed of sound is greatest in

A.plastic B.woodC.waterD.copper

Workspace18.wave fronts coming from small light bulb

A.sphericalB.cylindricalC.plane D.none of these

Workspace19.moving charge produces a

A.magnetic field B.electric fieldC.both a and b D.none of these

Workspace20.if the grating element is made 1/10th the resolving power will become

A.1/100 timesB.1/10 times C.100 timesD.10 times

Workspace21.if 60 capacitors are connected in series and then in parallel what is the ratio of Cs/Cp=?

A.250B.3600C.1/60D.1/3600

Workspace22.source of light is

A.sun B.moon C.glassD.none of these

Workspace23.When wood is replaced by air as dielectric. The capacitance of capacitor

A.decreasesB.increasesC.remains constantD.none of these

Workspace24.at resonance RLC circuit has impedance

A.inductiveB.capacitiveC.R/LCD.resistive

Workspace25.Which of the following is not an example of periodic motion

A.a man walking in street B.rolling ballC.a moving fan D.vibratory motor

Workspace26.energy of alpha and beta particles has the relation:

A.alpha > beta B.alpha < beta C.alpha=beta D.depends on source

Workspace27.Newton first law is applicable on

I)body in motion II)body in rest

A.I onlyB.II onlyC.neither a nor bD.both a and b

Workspace28.Two conducting objects, x and y having charge q on them exert force F on each other. now

third conductor having charge -q is touched with x and removed, the new force between x and

y isA.FB.F/2C.2FD.zero

Workspace29.which has the highest internal resistance

A.refrigeratorB.100 watt bulb C.tube lightD.ceiling fan

Workspace30.entropy is the measure of ________ of a system

A.heat B.kinetic energy C.momentumD.disorder

Workspace31.scattering of photon by electron is called

A.photoelectric effect B.pair production C.annihilationD.compton effect

Workspace32.when the source moves towards an observer then its frequency

A.increaseB.decrease C.remain constant D.none of these

Workspace33.which of the following can’t be used as a dielectric in a capacitor

A.waxB.ironC.airD.all of these

Workspace34.in a pure resistive circuit current and voltage are

A.in phase B.out of phase C.current leads

D.voltage leadsWorkspace

35.the constant between I and V is A.R B.1/RC.2RD.none of these

Workspace36.when a body moves with the speed of light then its mass approaches to

A.zeroB.infinityC.remains sameD.none of these

Workspace37.Efficiency of the Carnot's cycle will be 100% if the absolute temp is

A.+273KB.-273KC.100KD.0K

Workspace38.what happens to bulk of potential energy of a glass that falls from a table and breaks

A.converted into kinetic energyB.wasted in airC.converted into soundD.consumed in breaking of glass

Workspace39.the earth magnetic field deflects high velocity positive charge towards

A.northB.southC.west D.east

Workspace40.In Einstein's theory, the deflection of light is predicted to be exactly ________ as great as it is

according to Newton's theoryA.Four timesB.ThriceC.One and a half timeD.Twice

Workspace41.In hot day white clothes are worn because they are good

A.absorbers B.emitters C.reflectorsD.none of these

Workspace42.Forces in nature always occur in

A.triplet B.quadrupledC.isolation D.pair

Workspace43.In F= GMm/R the dimensions of G is?

A.[M-1L+2T-2] B.[M-1L+3T-2]C.[M-1L+2T-3]D.none of these

Workspace44.Mass of body is 10kg . What will be its weight if body moves 500*10^6 m away from the

surface of earth? A.9.8 B.0.98C.0.098D.equivalent to zero

Workspace45.blue colored source is seen Red if

A.source is moving away from observer B.observer is moving away from sourceC.gamma rays effect is observed D.none of these

Workspace46.a ballistic missile is

A.unpowered B.unguided C.both a and b D.none of these

Workspace47.Debroglie wavelength for an electron and proton are Le and Lp respectively. And frequencies

are Fe and Fp then correct one is A.Fe < Fp , Le > LpB.Le < Lp , Fp < FeC.Le < Lp , Fe = FpD.Le > Lp , Fe > Fp

Workspace48.light rays coming from the tube light are

A.plane B.sphericalC.cylindrical D.none of these

Workspace

49.when some charge is given to a soap bubble it A.increases in sizeB.decreases in size C.remain same D.collapses

Workspace50.Which one has the more resistance 500 watt or 40 watt?

A.40 wattB.500 wattC.both have equal D.depends on teh volatge source