Communications [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 60 - 62 of 106

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Question 60

Communications
Amplitude Modulation and Demodulation

Appeared in Year: 2010

Question

MCQ▾

Suppose that the modulating signal is and the carrier signal is , which one of the following is a conventional AM signal without over-modulation?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 61

Communications
Amplitude Modulation and Demodulation

Appeared in Year: 2014 (UGC-NET)

Question

Match List-Ⅰ List-Ⅱ▾

Match the following lists: (December)

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

Power efficient transmission

(i)

SSB-SC

(B)

Most bandwidth efficient transmission of voice signal

(ii)

VSB

(C)

Bandwidth efficient transmission of signals with significant d. c. component

(iii)

FM

(D)

Simplest receiver

(iv)

AM

Choices

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

a.

  • (i)
  • (ii)
  • (iii)
  • (iv)

b.

  • (iii)
  • (i)
  • (ii)
  • (iv)

c.

  • (ii)
  • (iii)
  • (iv)
  • (i)

d.

  • (iv)
  • (ii)
  • (iii)
  • (i)

Question 62

Communications
Circuits for Analog Communications

Appeared in Year: 2014 (UGC-NET)

Question

MCQ▾

The following is true for the multimode graded index fiber: (December)

1. The refractive index varies as a function of radial distance from the centre.

2. The refractive index undergoes sudden change at the cladding boundary.

3. It provides better bandwidth and the data rate than the multimode step index.

4. It provides the better bandwidth and data rate than single mode step index.

Choices

Choice (4)Response

a.

1 & 3

b.

2 & 4

c.

3 & 4

d.

1 & 4

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