Communications [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 50 - 53 of 106

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Question 50

Communications
Entropy, Mutual Information and Channel Capacity Theorem

Appeared in Year: 2014 (UGC-NET)

Question

MCQ▾

Arrange the following communication systems in increasing order of their available commercial bandwidth: (June)

1. Satellite Communication System

2. Amplitude Modulated System

3. Frequency Modulated System

4. Two-line transmission system

Correct sequence is

Choices

Choice (4)Response

a.

4,3, 2,1

b.

1,3, 2,4

c.

4,2, 3,1

d.

1,2, 3,4

Question 51

Communications
Amplitude Modulation and Demodulation

Appeared in Year: 2014 (UGC-NET)

Question

MCQ▾

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? (June)

Choices

Choice (4)Response

a.

6 KHz

b.

16 KHz

c.

10 KHz

d.

9.6 KHz

Question 52

Communications
Amplitude Modulation and Demodulation

Appeared in Year: 2013 (UGC-NET)

Question

Assertion-Reason▾

Assertion(Ꭺ)

TDM and FDM accomplish the same end by different means. (September)

Reason(Ꭱ)

FDM involves simpler instrumentation as compared to TDM.

Choices

Choice (4)Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question 53

Communications
Filtering of Random Signals through LTI Systems

Appeared in Year: 2014 (UGC-NET)

Question

Match List-Ⅰ List-Ⅱ▾

Match the following lists: (June)

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

Partition Noise

(i)

Resistance

(B)

Shot Noise

(ii)

Triode

(C)

Johnson Noise

(iii)

P-N junction

(D)

Current Noise

(iv)

Diode

Choices

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

a.

  • (iii)
  • (ii)
  • (i)
  • (iv)

b.

  • (iii)
  • (ii)
  • (iv)
  • (i)

c.

  • (iii)
  • (i)
  • (ii)
  • (iv)

d.

  • (ii)
  • (iv)
  • (i)
  • (iii)

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