GATE (Graduate Aptitude Test in Engineering) Electronics: Questions 282 - 284 of 1076

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Question 282

Clipping, Clamping and Rectifiers

Appeared in Year: 2017 (UGC-NET)

Question

MCQ▾

In a full wave rectifier, the current in each of the diode flows for: (November paper 2)

Choices

Choice (4)Response

a.

Quarter cycle of input signal

b.

Full cycle of input signal

c.

Half cycle of input signal

d.

Three fourth cycle of input signal

Question 283

Time Domain Analysis of Simple Linear Circuits

Appeared in Year: 2018 (UGC-NET)

Question

Match List-Ⅰ List-Ⅱ▾

Match the following:

List-Ⅰ (Column-I)List-Ⅱ (Column-II)
(A)

Am bipolar diffusion constant

(i)

(B)

Constant γ

(ii)

(n + p) DnDp/nDn + pDp

(C)

Am bipolar diffusion constant of the excess carriers

(iii)

(D)

Diffusion constant for holes

(iv)

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (ii)
  • (iii)
  • (i)
  • (iv)

b.

  • (iii)
  • (ii)
  • (i)
  • (iv)

c.

  • (iii)
  • (iv)
  • (ii)
  • (i)

d.

  • (iv)
  • (i)
  • (ii)
  • (iii)

Question 284

PCM, DPCM, Digital Modulation Schemes

Appeared in Year: 2018 (UGC-NET)

Question

MCQ▾

Which of the following statements are true in the case of Pulse Code Modulation (PCM) ?

1) If the number of bits per sample is increased from n to ; the ratio would be 6dB.

2) The quantization noise depends on sampling rate.

3) The main advantage of PCM is that it possesses better performance in presence of noise.

4) If the number of quantization levels increases from to , the bandwidth increase by a factor of . (July)

Choices

Choice (4)Response

a.

1) and 2) are correct

b.

1) and 4) are correct

c.

2) and 3) are correct

d.

1) and 3) are correct

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