Communication System-Amplitude and Frequency Modulation (NEET Physics): Questions 1 - 5 of 5

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Question number: 1

» Communication System » Amplitude and Frequency Modulation

MCQ▾

Question

If f a and f f represent the carrier wave frequencies for amplitude and frequency modulations respectively, then

Choices

Choice (4) Response

a.

faff

b.

fa=ff

c.

fa<ff

d.

fa>ff

Question number: 2

» Communication System » Amplitude and Frequency Modulation

MCQ▾

Question

In frequency modulation

Choices

Choice (4) Response

a.

The amplitude of modulated wave varies as amplitude of carrier wave

b.

The frequency of modulated wave varies as frequency of modulating wave

c.

The amplitude of modulated wave varies as frequency of carrier wave

d.

The frequency of modulated wave varies as amplitude of modulating wave

Question number: 3

» Communication System » Amplitude and Frequency Modulation

MCQ▾

Question

In an amplitude modulated wave for audio frequency of 500 cycle/second, the appropriate carrier frequency will be,

Choices

Choice (4) Response

a.

500 cycles/sec

b.

50, 000 cycles/sec

c.

50 cycles/sec

d.

100 cycles/sec

Question number: 4

» Communication System » Amplitude and Frequency Modulation

MCQ▾

Question

In an FM system a 7 kHz signal modulates 108 MHz carrier so that frequency deviation is 50 kHz. The carrier swing is

Choices

Choice (4) Response

a.

0.71

b.

8

c.

7.143

d.

350

Question number: 5

» Communication System » Amplitude and Frequency Modulation

MCQ▾

Question

In an amplitude modulated wave for audio frequency of 1000 cycle/second, the appropriate carrier frequency will be,

Choices

Choice (4) Response

a.

100 cycles/sec

b.

10 cycles/sec

c.

1000 cycles/sec

d.

10000 cycles/sec

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