Question

What is the total sideband power if there is 100% modulation?

(a) half the carrier wave

(b) twice the carrier wave

(c) equal to the carrier wave

(d) one-fourth of the carrier wave

I got this question in final exam.

This interesting question is from Spectrum of AM SC Waves topic in portion Side Band Techniques of Analog Communications

Answer 1

The correct option is (a) half the carrier wave

To explain I would say: The sidebands are identical to each other and contain same information. Thus, for 100% modulation, value of modulation index should be equal to 1. If modulation index, m=1 then total sideband power is equal to the half of carrier wave.