Bandwidth of AM wave

Bandwidth (B) of an AM signal is given by

a.) B= 2 ω_m
b.) B= (ω_c+ ω_m)- (ω_c- ω_m)
c.) ωm
d.) none of the above
e.) a) and b) are correct

Correct Answer: e) a) and b) are correct

Explanation:

Bandwidth of the AM wave is the difference in the two extreme frequencies of the AM signal. It is given by

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