What is modulation index?

An audio signal of amplitude one-third the carrier amplitude is employed in amplitude modulation. What is the modulation index?

A modulating signal is a square wave, as shown in Fig. 15.14. The carrier wave is given by c(t)=2sin(8 pi t )volts. What is the modulation index? :

What is a modulator ?

What is the importance of modulation index?

What is the modulation ? What is need for modulation?

A carrier wave of peak voltage 12V is used to transmit a message signal. What should be the peak voltage of the modulating signal in order to have a modulation index of 75%?