Download Aptitude Crack
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Communication Systems - Engineering

Q1:

In AM the amplitude of carrier components ... while in FM it

A remains constant, does not remain constant

B does not remain constant ... remains constant

C remains constant... also remains constant

D does not remain constant, also does not remain constant

ANS:A - remains constant, does not remain constant

This is the wrong answer. The answer should be B.

In AM which is Amplitude modulation so amplitude of carrier will be changed according to modulating signal and frequency remain constant. In FM which is frequency modulation so frequency will be changed according to modulating signal and amplitude remain constant in FM.