📣 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 June 2013 Past Paper Questions (Previous Year Papers) Part 2

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Q15. Quantization noise occurs in

(1) TDM

(2) PCM

(3) FDM

(4) WDM

Q16. Which antenna gets circularly polarized?

(1) Yagi-Uda

(2) Dipole

(3) Parabolic

(4) Helical

Q17. VSWR (Voltage Standing Wave Ratio) is always

(1) More than 1

(2) Less than 1

(3) 1

(4) 0.4

Q18. The ladder network used in D/A converter is

(1) Weighted resistance ladder

(2) R – R ladder

(3) R – 2R ladder

(4) R – C ladder

Q19. Latch is a

(1) T flip-flop

(2) Master-slave JK flip-flop

(3) D flip-flop

(4) JK flip-flop

Q20. In LED, light is emitted, because

(1) Diode emits light when gets heated.

(2) Recombination of charge carrier takes place.

(3) Light is made to reflect due to lens action.

(4) LED amplifies the light falling on it.

Q21. 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) : 8421 code is weighted code.

Reason (R) : 8421 code is 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.

Q22. 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) : A stack is a type of non-sequential access memory system.

Reason (R) : Memory stacks help in keeping track of return addresses and saving data for subroutines.

(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.

Q23. 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) : TEM waves exist in a waveguide.

Reason (R) : Phase velocity and wave impedance for TEM waves are independent of the frequency of the waves.

(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.

Q24. 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 FSK, a binary 1 usually produces a higher carrier frequency than a binary 0.

Reason (R) : FSK maintains a constant amplitude carrier.

(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.