Analog Communication - Electronic Engineering (MCQ) questions & answers for Q. 13644

Q.  Bandwidth (B) of an AM signal is given by
- Published on 13 Oct 15

a. B = 2 ωm
b. B = (ωc + ωm) - (ωc - ωm)
c. ωm
d. None of the above
e. Both a and b are correct

ANSWER: Both a and b are correct
 
Bandwidth of the AM wave is the difference in the two extreme frequencies of the AM signal. It is given by

B = (ωc + ωm)- (ωc - ωm)
= ωm
i.e., the bandwidth of the AM wave is twice the highest frequency present in the modulating signal.

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