Question

Frequency components of an AM wave are?

(a) Carrier frequency (ωc) with amplitude A

(b) Lower side band (ωc + ωm) having amplitude ^mA⁄4

(c) Upper side band (ωc – ωm) having amplitude ^mA⁄4

(d) Carrier frequency (ωc) with amplitude ^A⁄2

I had been asked this question during an online interview.

Question is from Noise for SSB-SC topic in section Noise of Analog Communications

Answer 1

Correct option is (a) Carrier frequency (ωc) with amplitude A

Explanation: Actually the frequency components of AM waves are – Carrier frequency (ωc) with amplitude A, Lower side band (ωc – ωm) having amplitude ^mA⁄2  and Upper side band (ωc + ωm) having amplitude ^mA⁄2 (where m represents modulation index).