For an audio signal of amplitude 0.1 V, used in amplitude modulation of a carrier wave of amplitude 0.2 V, the modulation index would be:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 0.5
The modulation index (m) is -
$m=\frac{A_m}{A_c}=\frac{0.1}{0.2}=0.5$