Electric Communications (NTA-NET (Based on NTA-UGC) Electronic Science (Paper-II)): Questions 1 - 4 of 12

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Question number: 1

» Electric Communications » Frequency and Phase Modulation

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MCQ▾

Question

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

i. Satellite Communication System

ii. Amplitude Modulated System

iii. Frequency Modulated System

iv. Two-line transmission system

Correct sequence is

Choices

Choice (4) Response

a.

iv, iii, ii, i

b.

i, ii, iii, iv

c.

i, iii, ii, iv

d.

iv, ii, iii, i

Question number: 2

» Electric Communications » Frequency and Phase Modulation

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MCQ▾

Question

According to Hatley’s law

Choices

Choice (4) Response

a.

The maximum rate of information depends on the channel bandwidth

b.

The maximum rate of information depends on the depth of modulation

c.

Only binary codes can be used

d.

Redundancy is essential

Question number: 3

» Electric Communications » Intermediate Frequency and Principle of Superheterodyne Receiver

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Appeared in Year: 2017

MCQ▾

Question

The ability of a receiver to discriminate against the interfering signals is known as: (November paper 2)

Choices

Choice (4) Response

a.

Distortion

b.

Selectivity

c.

Sensitivity

d.

Fidelity

Question number: 4

» Electric Communications » Digital Modulation and Demodulation

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Appeared in Year: 2018

MCQ▾

Question

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