Q 12-08-084JEE MainJEE Main 2023 (24 Jan, Shift 1)Easy
A modulating signal is a square wave, as shown in the figure. If the carrier wave is given as $c(t)=2\sin8\pi t$ volts, the modulation index is
Answer: (D) $\dfrac12$
The message amplitude is $A_m=1\ \text{V}$ and the carrier amplitude is $A_c=2\ \text{V}$:
$$\mu=\frac{A_m}{A_c}=\frac12$$
Solution by Sreeraj P, M.Sc Physics