Question

A carrier is simultaneously modulated by two sine waves with modulation indices of 0.4 and 0.3. The resultant modulation index will be

(a) 1.0

(b) 0.7

(c) 0.5

(d) 0.35

I got this question in my homework.

My question is from Amplitde Modulation topic in chapter EDC Overview of Electronic Devices & Circuits

Answer 1

The correct option is (c) 0.5

Best explanation: α^2 = 0.3^2 + 0.4^2 = 0.5^2 or α = 0.5.