Amplitude Modulation Basics

Definition, modulation index, time domain equation.

Darshan N
Updated: 19 March 2026
9 min read

AM Basics Quiz

Test your command of amplitude modulation fundamentals, index calculation, and time domain equations.

Question 1 of 3

Q1.An AM signal is given by s(t) = Ac[1 + 0.6cos(2*pi*fm*t)]cos(2*pi*fc*t). What is the modulation index, and what is the peak amplitude of the AM signal?