Frequency spectrum of AM signal

Q.  Frequency components of an AM wave (m = modulation index) are
- Published on 13 Oct 15

a. Carrier frequency (ωc ) with amplitude A
b. Upper side band (ωc + ωm) having amplitude mA/2
c. Lower side band (ωc - ωm) having amplitude mA/2
d. All of the above

ANSWER: All of the above
 
Frequency components of an AM wave having m modulation index are

- carrier frequency (ωc ) with amplitude A

- upper side band (ωc + ωm) having amplitude mA/2

- lower side band (ωc - ωm) having amplitude mA/2

with these components of AM wave, the frequency spectrum may be plotted as
frequency spectrum of AM signal

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