1 Differential amplifiers are used ina. instrumentation amplifiersb. voltage followersc. voltage regulatorsd. buffers

2 The output voltage Vo of the above circuit is

a.-6Vb.-5Vc.-1.2Vd.-0.2V

3 The ideal OP-AMP has the following characteristics.a) Ri=∞ ,A=∞ ,R0=0b) Ri=0 ,A=∞ ,R0=0c) Ri=∞ ,A=∞ ,R0=∞d) Ri=0 ,A=∞ ,R0=∞

4 How many op-amps are required to implement this equation

A. 2B. 3C. 4D. 1

5 A very brief, high voltage spike on an ac power line is called asA. A bleederB. An arcC. A transientD. An avalancheE. A clipped peak

6 You can find the zener diode inA. The mixer in a superheterodyne receiverB. The PLL in a circuit for detecting FMC. The product detector in a receiver for SSBD. The voltage regulator in a power supplyE. The AF oscillator in an AFSK transmitter

7 A network function can be completely specified by:(A) Real parts of zeros(B)Poles and zeros(C)Real parts of poles(D)Poles, zeros and a scale factor

8 A unit impulse voltage is applied to one port network having two linear components. If the current through the network is 0 for t<0 and decays exponentially for t>0 then the network consists of(A) R and L in series(B)R and L in parallel(C)R and C in parallel(D)R and C in series

9 The Q-factor of a parallel resonance circuit consisting of an inductance of value 1mH, capacitance of value 10-5 F and a resistance of 100 ohms is(A) 1(B)10(C) π 20(D) 100

10 In a travelling electromagnetic wave, E and H vector fields are(A) perpendicular in space .(B) parallel in space.(C) E is in the direction of wave travel.(D) H is in the direction of wave travel.

11 The lower cut -off frequency of a rectangular wave guide with inside dimensions (3 × 4.5 cm) operating at 10 GHz is(A) 10 GHz.(B)9 GHz.(C) 10/9GHz.(D) 10/3GHz

12 The intrinsic impedance of free space is(A) 75 ohm.(B)73 ohm.(C)120 π ohm.(D)377ohm

13 Which one of the following conditions will not guarantee a distortion less transmission line(A)R = 0 = G(B)RC = LG(C) very low frequency range (R>> ω L, G >> ω C)(D) very high frequency range (R<< ω L, G << ω C)

14 MOSFET can be used as a(a) current controlled capacitor (b) voltage controlled capacitor(c) current controlled inductor (d) voltage controlled inductors

15 In a common emitter, unbypassed resister provides(a)voltage shunt feedback (b)current series feedback(c)negative voltage feedback (d)positive current feedback

16 Introducing a resistor in the emitter of a common amplifier stabilizes the dc operating point against variations ina) Only the temperature b) only the β of the transistorc) Both Temperature & β d) None of the above

17 For the circuit shown in Fig.4, the voltage across the last resistor is V.All resistors are of Ω 1 .The Vs is given by

(A) 13V. (B) 8V.(C) 4V. (D)1V

18 The network has a network function Z(s)=s(s+2)/(s+3)(s+4)(A)not a positive real function. (B)RL network.(C) RC network. (D)LC network

19 For a series R-C circuit excited by a d-c voltageof 10V, and with time-constant s, , τ the voltage across C at time τ = t is given byA.10(1-e-1) v B.10(2-e-2) vC.10-e-1voltsD.1-e-1

20 A 2 port network using Z parameter representation is said to be reciprocal ifA.Z11=Z22B.Z12=Z21

C.Z12=-Z21D.Z11–2Z22=0

Questions 1 – 5 : In the question 1 to 5 select the one which is different from rest three:1. A. Bullet B. Rifle C. Pistol D. Gun E. None of theseAns : A. Bullet

2. A. 7426 B. 3672 C. 4465 D. 5572 E. None of theseAns : B. Except 3672, the sum of the digits of all other number is 19.

3. A. Chess B. Cricket C. Table Tennis D. Carrom E. None of theseAns : B. Cricket

4. A. Girls B. Boys C. Friends D. Flowers E. None of theseAns : D. Flowers

5. A. Petrol B. Diesel C. Vanaspati D. Kerosene E. None of theseAns : C. Except Vanaspati all others are petroleum products

Questions 6 – 10 : In each of the following items the first two words have some relationship. Find out word from 4 alternatives given, which as the same relationship with the third word:6. Doctor : Patient : : Advocate:A. Witness B. Fees C. Client

D. Thief E. None of theseAns : C. Client

7. Flower : Bouquet : : Bank :A. Captain B. Team C. Playground D. Flock E. None of theseAns : B. Team

8. Post-office : Envelope : : Bank :A. Account B. Money C. Cheque D. Manager E. None of theseAns : B. Money

9. Peace : Amity : : Conceal :A. Reveal B. Hide C. Disappear D. Proclaim E. None of theseAns : B. Hide

10. Ear : Music : : NoseA. Face B. Breath C. Smell D. Voice E. None of theseAns : C. Smell

Questions 11-15 : Choose the correct answer from the alternatives given:11. A student bought 4 books of Rs 120, from one book-shop and 6 books for Rs.150 from another. The average price he paid per book, was:A. Rs.27 B. 27 1/2 C. 135 D. 138 E. None of theseAns : A. Average price = 120 * 150 = 270 = Rs 2710 10

12. If the rate of simple interest is 12 % per annum the amount that that would fetch

interest of Rs.6,000 per annum isA. Rs. 720 B. Rs. 48543.69 C. Rs. 50,000D. Rs. 72,000 E. None of theseAns : C. Required sum = 6000 * 100 = Rs. 50,000

13. Raghu ranks 19th in the class of 40. What is his rank from the last?A. Rs. 20B. 19 C. 21 D. 22 E. None of theseAns : D. Raghu’s rank from the last = 40 – 19 + 1 = 22

14. The income of Ramesh is 25% more than the income of Mahesh. The income of Mahesh is less than income of Ramesh by:A. 20% B. 25% C. 30% D. 50% E. None of theseAns : A. Required Percent = 25 * 100 = 20 %

15. If the perimeter of a rectangular filed is 200m and its breadth is 40m then is its area (in m2) isA. 1200 B. 2400 C. 4800 D. 6000 E. None of theseAns : B. Let / be the length of the rectangle. 1 = 60 m ie Area = 60 * 40 = 2400 m2Then 2 ( / + 40) = 200

1. In connection with which of the following movements did Gandhiji come to kerala ?A) Guruvayoor Satyagraha B) Vaikam Satyagraha C) Paliam Satyagraha D) Salt SatyagrahaAns : B) Vaikam Sathyagraha

2. The Scientist who arranged elements to their increasing atomic weight is:A) Dalton B) Avogadro C) Mendeleev D) Mendel

Ans : C) Mendeleev

3. Which of the following is not a part of an atom?A) Ion B) Electron C) Proton D) NeutronAns : A) Ion

4. Under which category of winds does the cyclone fall?A) Local winds B) Trade winds C) Variable Winds D) Periodic WindsAns : D) Periodic winds

5. Which of the metropolitan cities of India is nearest to the equator?A) Delhi B) Mumbai C) Chennai D) CalcuttaAns : C) Chennai

6. The person who is said to be the “Iron man” of India is:A) Subhash Chandra Bose B) Bhagat Singh C) V.K Krishna MenonD) Sardar Vallabhai PatelAns : D) Sardar Vallabhai Patel.

7. The person who occupied the post of the President of India for two sessions continuously wasA) Dr. Radhakrishnan B) Dr. Rajendra PrasadC) Dr. Zakir Hussain D) Dr. Shankar Dayal SharmaAns : B) Dr. Rajendra prasad

8. The name given to a substance formed by the chemical combination of two more metal isA) Alloy B) Ore C) Compound D) MineralAns : A) Alloy

9. To which of the following is Group III metal?A) Calcium

B) Aluminum C) Sodium D) IronAns : B) Aluminum

10. Which of the following does petroleum belong?A) Nitrate B) Oxide C) Fat D) HydrocarbonAns : D) Hydrocarbon

11. Paralysis is caused by disorders connected withA) Muscles B) Lungs C) Joints D) BrainAns : D) Brain

12. The food item that provides energy for growth is:A) Carbohydrates B) Vitamins C) Protins D) MineralsAns : A) Carbohydrates

13. The scientist who gave scientific laws of heredity for the first time wasA) Charles Darwin B) Issac Newton C) Lamarck D) MendelAns : D) Mendel

14. What is the physical basis of inheritance of characters in animals ?A) Cells B) Genes C) Blood D) TissuesAns : B) Genes

15. Which of the following is an excretory organ ?A) Kidney B) Intestine C) Liver D) StomachAns : A) Kidney

16) Which is a disease cause by disorder of the respiratory system ?

A) Hypertension B) Jaundice C) Imbalance of cholesterolD) PneumoniaAns : D) Pneumonia

17. Which of the following creatures is not purely aquatic?A) Shark B) Whale C) Crocodile D) OctopusAns : C) Crocodile

18. Which of the following is a mammal ?A) Crocodile B) Tortoise C) Bat D) SnakeAns : C) Bat

19. With which crop is the name « Jaya » associated ?A) Coconut B) Pepper C) Wheat D) RiceAns : D) Rice

20. Who was the Agricultural scientist who gave leadership to the “Green Revolution”?A) Dr. M.S. Swaminathan B) Jagadeesh Chandra BoseC) Dr. Chandrasekhar D) Dr. KhoranaAns : A) Dr. M.S Swaminathan

21. Which of the following places has contributed to a famous variety of goats?A) Malappuram B) Kasaragod C) Thalasseri D) KozhikkodeAns : A) Malappuram

22. Which of the following varieties of cows is Indian in origin?A) Sindhi B) Jersy C) Hostein D) Swiss BrownAns : A) Sindhi

23. To which of the following is the term “Operation Flood” associated?A) Time bound programme for better irrigationB) Effort for increasing production of milkC) Pevention of floods in Indian riversD) Military operation against militant forcesAns : B) Effort for increasing production of milk

24. Where is the Central Rice Research Institute Situated ?A) Pattambi B) Vellayani C) Kasargod D) MannuthiAns : A) Pattambi

25. A non-living component of living cell is:A) Ribosome B) Mitochondria C) Vacuole D) Endoplasmic reticulumAns : C) Vacuole

Questions 1 – 5 : Which does not belong to the same group.1. A. JupiterB. MercuryC. MoonD. NeptuneE. None of theseAns : C. Except Moon, all others are planets.

2. A. SquareB. RectangleC. CircleD. ParallelogramE. None of theseAns : C. Except Circle, All others have four sides

3. A. AppleB. CarrotC. MangoD. GrapesE. None of theseAns : B. Except Carrot, All others are fruits.

4. A. BenchB. StudentC. DeskD. TableE. None of theseAns : B. Except student, all others are furniture

5. A. LandB. LakeC. SeaD. RiverE. None of theseAns : A. Except Land, all others have water.

Questions 6 – 10 : 3 words are given. The first two in each group are related in some way. Choose 4th word which is related to the 3rd word as one and two are related:6. Ship : Water = train :___A. PathB. RoadC. PassengerD. TrackE. None of theseAns :D. Train passes through Track

7. Doctor : Patient = teacher :____A. ClassB. StudentC. SchoolD. LessonE. None of theseAns : B. Teacher : Student

8. Paper : Pen = blackboard :___A. ChalkB. WoodC. ClassD. CardboardE. None of theseAns :.A. Blackboard : Chalk

9. Individual : Family = Family :___

A. StateB. HouseC. SocietyD. NationE. None of theseAns : Family : Society

10. HIJ : MNO = RST :___A.WXYB. UVMC. VWXD. XYZE. None of theseAns : RST : WXY, There are two letters between J & M in the same way there are two letters between T and W.

Question 11 – 12: Complete the series :11. 1/5, 3/7, 6/11, 10/19,____A.15/35B. 16/35C. 17/35D. 20/35E. None of theseAns :A. 15 Here the numerator follows the rule +2, +3, +4, +5, and the denominator 35, follows the rule +2, +4, +8, +16,……..

12. F. K. P _____A. TB. UC. VD.QE. None of theseAns :B. F >K >P >U

13. A husband and wife have five married sons. Each of these had four children. How many members are there in the family?A. 50B. 40C. 32D. 36E. None of theseAns : C. There are 32 members in the family.

14. In a certain code POLISH is written as MLIFPE. How id DIG written in the same code?A.GLJB. CHIC. ECHD. AFDE. None of theseAns : D. AFD

15. Mr. X travels towards 3½Kms. North , then turns towards west and travel 1½Kms. Then he turns towards south and travels 3 ½ Kms. How far is he from his starting point?A. 7Kms.B. 4½ Kms.C. 2½ Kms.D. 1½ Kms.E. None of theseAns : D. 1½ Kms.

16. The law by which people are asked to submit to Government accounts of dealings in foreign currency is:A) FREAB) Customs lawC) Income-tax lawD) TADAAns : A) FREA

17. The Konkan railway has been constructed between:A) Thiruvananthapuram and MumbaiB) Mangalore and ChennaiC) Thiruvananthapuram and GoaD) Mangalore and MumbaiAns : D) Mangalore and Mumbai

18. The part of a computer, which receives the information supplied, is:A) Control UnitB) Memory UnitC) Output UnitD) Input UnitAns : D) Input Unit

19. When did the dynasty of Sultans rule over India?A) Between 17th century A.D and 19th century A.D

B) Between 13th century A.D and 16th century A.DC) Between 8th century A.D and 10th century A.DD) Between 5th century A.D and 8th century A.DAns : B) Between 13th Century and 16th Century A.D.

20. The name given to the symbol of the National games held atBangalore wasA) NandiB) NanduC) AppuD) MickyAns : B) Nandu

21. The tennis player who won the ladies single championship inWimbledon, the most times:A) Monica SelesB) Steffi GraphC) Martina HingisD) Martina NavratilovaAns : D) Martina Navratilova

22. Under what condition does a lunar eclipse take place?A) The earth comes between the sun and the moonB) The Moon comes between the sun and the earthC) The sun comes between the earth and the moonD) The sun, moon and earth are in a straight line in any orderAns : A) The earth comes between sun and moon

23. The name given to the instrument sent to Mars, in 1997, for investigations, by moving around is:A) OrbiterB) VikingC) MarinerD) SojournerAns : D) Sojourner

24. Why is it that the color of earth is red at certain places?A) It contains more nitrogenB) It contains oxides of ironC) It contains sand formed out of red rocksD) It does not contain alluvial soilAns : B) It contains oxides of iron

25. The film actor who received Dada Saheb Phalke Award for 1996, given in 1997 isA) Kamala Hasan

B) Dr. Raj KumarC) Sivaji GaneshanD) Ashok KumarAns : C) Sivaji Ganesan.

26. Which of the following gives the percentage of carbon dioxide present in atmosphere?A) 5%B) 3%C) .3%D) .03%Ans : D) .03%

27. Whose name is associated with the Theory of Evolution?A) LamarckB) WeismanC) Charles DarwinD) De vriesAns : C) Charles Darwin

28. The Paris Commune took place inA) 1900B) 1871C) 1921D) 1847Ans : B) 1871

29. The Srimoolam Prajasabha was established in Travancore in :A) 1904B) 1910C) 1918D) 1932Ans : A) 1904

30In connection with which of the following movements did Gandhiji come to kerala ?A) Guruvayoor Satyagraha B) Vaikam Satyagraha C) Paliam Satyagraha D) Salt Satyagraha

1 Consider a transmission line of characteristic impedance 50 ohms and the line is terminated at one end by +j50 ohms, the VSWR produced in the transmission line will be(A) +1

(B)zero(C)infinity(D)-1

2 In a certain medium E = 10 Cos(108t–3y) a xV/m. What type of medium is it?(A) Free space (B)Lossy dielectric(C)Lossless dielectric(D)Perfect conductor

3 If D⋅∇=∈∇.Eand∇.J = σ∇.Ein a given material, the material is said to be(A) Linear(B)Homogeneous(C) Isotropic (D) Linear & Homogeneous

4 For a 300 Ω antenna operating with 5A of current, the radiated power is(A) 7500 W (B) 750 W(C)75 W (D)7500 mW

5. An OPAMP has a slew rate of 5 V/μ S .The largest sine wave O/P voltage possible at a frequency of 1MHZ is (a) 10 volts (b) 15 volts(c) 5/3 vo lts(d)5/2 volts

6 The early effect in a bipolar junction transistor is caused by(a) fast turn-on (b)fast turn-off(c) large collector-base reverse bias (d) large emitter-base forward bias

7 MOSFET can be used as a(a) current controlled capacitor(b) voltage controlled capacitor(c) current controlled inductor(d) voltage controlled inductors

8 An AM signal is detected using an envelop detector. The carrier frequency and modulating signal frequency are 1MHz and 2 kHz respectively. An appropriate value for the time constant of the envelopedetector is.

(A) 500 μsec(B) 20 μsec(C) 0.2 μsec(D) 1μ sec

9 An AM modulator has output x(t)=A cos400 πt+Bcos 380 πt +Bcos420πt and The carrier power is 100 W and the efficiency is 40%. The value of A and B are(A) 14.14, 8.16 (B) 50, 10(C) 22.36, 13.46 (D) None of the above

10 A super heterodyne receiver is designed to receive transmitted signals between 5 and 10 MHz. High-side tuning is to be used. The tuning range of the local oscillator for IF frequency 500 kHz would be(A) 4.5 MHz-9.5 MHz(B) 5.5 MHz-10.5 MHz(C) 4.5 MHz-10.5 MHz(D) none of these

11 An analog signal is sampled at 36 kHz and quantized into 256 levels.The time duration of a bit of the binary coded signal is(A) 5.78μs (B) 3.47μs(C) 6.43 ms(D) 7.86 ms

12 The minimum sampling frequency (in samples/sec) required to reconstruct the following signal form its samples without distortion would be x(t)= 5(sin2 π 1000t/πt)3 +7(sin 2πt 1000t/πt)2(A)2x103(B)4x103(C) 6x103(D) 8x103

13 Three identical amplifier, each having a spot effective input noise temperature of 125 K and available power G are cascaded. The overall spot effective input noise temperature of the cascade is 155 K. The Gis(A) 3 (B) 5(C) 7 (D) 9

14 In the Op-Amp circuit shown, assume that the diode current follows the equation I=I s exp(V/Vt) Vi=2V , Vo=V01and for Vi=4V , Vo=V02The relationship between V01andV02is

15 The counter shown in fig. below is a

(A) MOD–8 up counter(B) MOD–8 down counter(C) MOD–6 up counter(D) MOD–6 down counter

16 The MUX shown in fig. multiplexer. The output Z is

(A) A xor C (B) A and C(C) B xor C (D) B and C

n analog electronics: Most of the questions will come from OP-AMP, feedback amplifiers, oscillators, amplifiers, diode equation, zener diode, A-D and D-A converters. In digital electronics: K-map, Combinational (Multiplexer, encoder, decoder, basic logic circuits) and sequential circuits (flip-flops, registers, counters). In electromagnetic: Maxwell’s equations, Electromagnetic wave propagations, transmission lines, microwave. In communications: AM, FM, PM, PCM, DM, FSK, QPSK, PAM, PPM, noise, ISI, probability of errors, In control systems: Stability, steady state response, transient response, compensators, Root locus, bode plot. In signal and systems: signal basics, system basics, Fourier transform, laplace transform, z-transform. In microprocessor: mainly they will ask 8085 basics and small programs. In network theory: nodal analysis, mesh analysis, theorems (thevinens, nortons, max power theorem, superposition), two port networks.