📣 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 September 2013 Higher Questions and Answers Part 2

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Q-16 The output impedance in an ideal Op-Amp is

  1. Zero
  2. 20 Ω
  3. 60 Ω
  4. Infinity

Q-17 What will be the output of the following statements?

int a = 5, b = 2, c = 10, i = a > b

Void main ()

{print f ( “hello” ) ; main () ;}

  1. 1
  2. 2
  3. Infinite number of times
  4. 10

Q-18 Which data communication method is used for sending data in both directions at the same time?

  1. Super duplex
  2. Simplex
  3. Half duplex
  4. Full duplex

Q-19 The highest data rate in fibre optic communication occurs in

  1. Single-mode fibre
  2. Graded-index fibre
  3. Multimode fibre
  4. Co-axial cable

Q-20 Routh՚s array for a system is given below:

S4 1 3 5

S3 1 2 9

S2 1 5

S1 – 3

S0 5

The system is

  1. Stable
  2. Unstable
  3. Marginally stable
  4. Conditionally stable

Q-21 The following items consist of two statements, one labelled as “Assertion (A) ” and the other labelled as the “Reason (R) ” . You are to examine the two statements carefully and decide if the Assertion (A) and the Reason (R) are individually true and if so whether the reason is a correct explanation of the assertion. Select your answer to these items using the codes given below and mark your answer accordingly.

Assertion (A) : In a common base amplifier voltage gain is more than 1.

Reason (R) : In a common base amplifier current gain is less than 1.

(1) Both (A) and (R) are true and (R) is the correct explanation of (A) .

(2) Both (A) and (R) are true, but (R) is not the correct explanation of (A) .

(3) (A) is true, but (R) is false.

(4) (A) is false, but (R) is true.

Q-22 The following items consist of two statements, one labelled as “Assertion (A) ” and the other labelled as the “Reason (R) ” . You are to examine the two statements carefully and decide if the Assertion (A) and the Reason (R) are individually true and if so whether the reason is a correct explanation of the assertion. Select your answer to these items using the codes given below and mark your answer accordingly.

Assertion (A) : Op-Amp is used for amplification of weak signals.

Reason (R) : To rectify EMG signals, precision rectifiers are used.

(1) Both (A) and (R) are true and (R) is the correct explanation of (A) .

(2) Both (A) and (R) are true, but (R) is not the correct explanation of (A) .

(3) (A) is true, but (R) is false.

(4) (A) is false, but (R) is true.

Q-23 The following items consist of two statements, one labelled as “Assertion (A) ” and the other labelled as the “Reason (R) ” . You are to examine the two statements carefully and decide if the Assertion (A) and the Reason (R) are individually true and if so whether the reason is a correct explanation of the assertion. Select your answer to these items using the codes given below and mark your answer accordingly.

Assertion (A) : Gray is unweighted code.

Reason (R) : Gray code is not self-complementary.

(1) Both (A) and (R) are true and (R) is the correct explanation of (A) .

(2) Both (A) and (R) are true, but (R) is not the correct explanation of (A) .

(3) (A) is true, but (R) is false.

(4) (A) is false, but (R) is true.

Q-24 The following items consist of two statements, one labelled as “Assertion (A) ” and the other labelled as the “Reason (R) ” . You are to examine the two statements carefully and decide if the Assertion (A) and the Reason (R) are individually true and if so whether the reason is a correct explanation of the assertion. Select your answer to these items using the codes given below and mark your answer accordingly.

Assertion (A) : TDM and FDM accomplish the same end by different means.

Reason (R) : FDM involves simpler instrumentation as compared to TDM.

(1) Both (A) and (R) are true and (R) is the correct explanation of (A) .

(2) Both (A) and (R) are true, but (R) is not the correct explanation of (A) .

(3) (A) is true, but (R) is false.

(4) (A) is false, but (R) is true.