Communications [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 1 - 4 of 106

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Question 1

Appeared in Year: 2017

Question MCQ▾

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

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Question 2

Appeared in Year: 2018

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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Question 3

Question MCQ▾

A wideband amplifier has a precise amplification factor ________.

Choices

Choice (4)Response

a.

Neutral

b.

Less than the wide range

c.

Over the wide range

d.

Equal to the wide range

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Question 4

Appeared in Year: 2018

Question MCQ▾

Which of the following statement is correct? (July)

Choices

Choice (4)Response

a.

MF radio frequency waves are called long waves and HF are called short waves.

b.

VLF and LF radio frequency waves are called long waves while HF waves are called short waves.

c.

LF radio waves are called long waves and VHF are called short waves

d.

ELF radio waves are called long waves and HF are called short waves.

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