GATE (Graduate Aptitude Test in Engineering) Electronics: Questions 371 - 373 of 1076

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Question 371

Amplitude Modulation and Demodulation

Question

MCQ▾

Which of the following statement are correct in case of PCM (pulse code modulation) ?

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

2. The quantization noise depends on sampling rate

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

4. If the number of quantization levels increases from 4 to 64, the bandwidth increase by a factor of 4.

Choices

Choice (4)Response

a.

1 and 2 are correct

b.

1 and 4 are correct

c.

1 and 3 are correct

d.

2 and 3 are correct

Question 372

Appeared in Year: 2016 (UGC-NET)

Question

Match List-Ⅰ List-Ⅱ▾

Match the following lists:

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

hie

(i)

ic/ib

(B)

hre

(ii)

ic/Vc

(C)

hfe

(iii)

Vb/Vc

(D)

hoe

(iv)

Vb/ib

Choices

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

a.

  • (iv)
  • (iii)
  • (ii)
  • (i)

b.

  • (iv)
  • (iii)
  • (i)
  • (ii)

c.

  • (iii)
  • (i)
  • (iv)
  • (ii)

d.

  • (ii)
  • (i)
  • (iii)
  • (iv)

Question 373

Appeared in Year: 2018 (UGC-NET)

Question

MCQ▾

Consider the following statements with respect to the characteristic polynomial defined as

The system is stable for

ii. The system is unstable for

iii. The system is unstable for

iv. The system is stable for

Which of the above statements are correct?

Choices

Choice (4)Response

a.

(i) and (iv)

b.

(i) and (iii)

c.

(ii) and (iv)

d.

(ii) and (iii)

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