Draw a plot of the variation of amplitude versus `omega` for an amplitude modulated wave. Define modulation index. State its importance for effective amplitude modulation.

Explanation

A plot of amplitude versus `omega` for an amplitude modulated wave :
Modulation index :
Modulation index is the ratio of amplitude of modulating voltage `(A_(m))` and amplitude of carrier voltage `(A_(c))`.
Modulation index `mu` is `mu=(A_(m))/(A_(c))`.
Importance : The amplitude modulation index `(mu)` determines the quality of the transmitted index.
When modulation index is small, variation in carrier amplitude will be small.