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Modulation - Analog Communication MCQs

Modulation MCQ : Here you will find MCQ Questions related to "Modulation" in Analog Communication. These Modulation MCQ Questions Will help you to improve your Analog Communication knowledge and will prepare you for various Examinations like Competitive Exams, Placements, Interviews and other Entrance Exmaniations.




Question 1

For a signal to be transmitted to a distance, without the effect of any external interferences or noise addition and without getting faded away, it has to undergo a process called as?

A. modulation
B. signal
C. carrier signal
D. message signal

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Question 2

The signal which contains a message to be transmitted, is called as a?

A. modulating signal
B. message signal
C. carrier signal
D. None of the above

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Question 3

How many types of modulations?

A. 3
B. 1
C. 2
D. 4

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Question 4

In digital modulation, the modulation technique used is Pulse Code Modulation (PCM) where the analog signal is converted into digital form of 1s and 0s.

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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Question 5

Squelch circuit is normally inserted in receiver ________.

A. before detector
B. before mixer
C. after power amplifier
D. after detector

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Question 6

In __________________, a high frequency sine wave is used as a carrier wave

A. Pulse Modulation
B. Frequency Modulation
C. Continuous-wave modulation
D. Amplitude Modulation

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Question 7

For Amplitude Modulation, Emitter modulator ________

A. Operates in class C mode
B. Has a low efficiency
C. Output power is high
D. Operates in class B mode

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Question 8

Signal to Noise ratio for a hi-fi system is equal to ________

A. 100 dB
B. 10 dB
C. 75 dB
D. 50 dB

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Question 9

The resultant signal after the process of modulation is called as a modulated signal

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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Question 10

Leak type bias is used in plate modulated amplifier to ________

A. increase bandwidth
B. decrease bandwidth
C. prevent excessive grid current
D. prevent tuning

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