Types OF propage and modulation

In modulation we

Modulators

Types Of Modulation

Degree of modulation-

An amplitude modulated wave is as shown in the figure. What is the percentage of modulation ?

In frequency modulation

Modulation and De-modulation| why we require modulation and de-modulation

When the modulating frequency is doubled, the modulation index is halved and the modulating voltage constant the modulation system is

Modulation voltage and carrier voltage of a wave is 12 and 4. Find modulation index