📣 Paper 3 has been removed from NET from 2018 (Notification)- now paper 2 and 3 syllabus is included in paper 2. Practice both paper 2 and 3 from past papers.

NTA NET Electronic Science Paper 2 June 2014 Higher Questions and Answers Part 1

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Q-1 For the circuit shown in figure, the terminal voltage Vab is given by:

Terminal Voltage Vab
  1. 5 V
  2. 6 V
  3. 2.5 V
  4. 3 V

Q-2 The earth has a conductivity of 10-2 mho/m, ∈ r = 10, µr = 2, f = 10 GHz, the earth behaves like a

  1. Good conductor
  2. Moderate conductor
  3. Good dielectric
  4. Bad dielectric

Q-3. The carrier velocity in a silicon p-i-n photodiode with 25 µm depletion layer width is 3 × 104 m/s. The maximum response time for the pin diode is given by:

  1. 52 ns
  2. 2.5 ns
  3. 62 ns
  4. 5.2 ns

Q-4. For a JFET, above the pinch-off voltage, as the drain voltage increases, the

  1. the drain current remains constant.
  2. the drain current decreases.
  3. the drain current increases linearly.
  4. the drain current varies parabolically.

Q-5. What bandwidth is needed for an FM signal that has a peak deviation of ± 3 KHz and handles audio signals from 200 Hz to 5 KHz?

  1. 6 KHz
  2. 16 KHz
  3. 10 KHz
  4. 9.6 KHz

Q-6. In which of the following base system, 132 is not a valid number?

  1. Base 16
  2. Base 10
  3. Base 8
  4. Base 2

Q-7. What is the relation between k and T such that a unity feedback control system whose open loop transfer function below is stable?

Relation between K and T
  1. 0 < k < 10T
  2. 0 > k > 10T
  3. 0 < k < T
  4. 0 < k > T

Q-8. Microprocessor development had happened because of LSI. What is LSI?

  1. Large Scale Integral
  2. Large Signal Integration
  3. Large Scale Integration
  4. Long Signal Integration

Q-9. ‘Stdio. h’ header file contains functions related to

(1) prototypes for the standard input/output library functions.

(2) prototypes for the standard input and standard output functions.

(3) prototypes for the functions that perform input from files.

(4) prototypes for functions that perform input from strings in memory and outputs to strings in memory.

Q-10. The threshold voltage of a MOSFET can be lowered by

1. using a thinner gate oxide

2. reducing the carrier concentration in the substrate

3. increasing the carrier concentration in the substrate

Select the correct answer using the codes given below:

  1. 3 alone is correct.
  2. 1 and 2 are correct
  3. 1 and 3 are correct
  4. 2 alone is correct

Q-11. An angular position to be measured using a transducer. Which of the following types of transducers can be used for this purpose?

1. Circular potentiometer

2. LVDT

3. E-pick off

4. Synchro

Select the correct answer using the codes given below:

  1. 1,2, 3 and 4
  2. 2 and 3
  3. 1,2 and 4
  4. 1 and 4

12. In a hybrid TEE (Magic T) , following statements are given:

1. S11, S22, S33 and S44 are nonzero.

2. All junctions are reciprocal i.e.. Sjk = Skj

3. S11, S22, S33 and S44 are zero.

4. S13 = – S23, S14 = S24, S43 = 0 and S34 = 0

Which one of the following is true?

  1. 1,2 and 4 are correct.
  2. 1 and 2 are correct.
  3. 2,3 and 4 are correct.
  4. 1,2 and 3 are correct.