A modulating signal is a square wave, as shown in the figure. If the carrier wave is given as $$c(t) = 2\sin(8\pi t)$$ volts, the modulation index is:

The given modulating signal is a square wave of amplitude

$$A_m = 1$$

Amplitude of carrier wave:

$$A_c = 2$$

Modulation index is given by

$$\mu = \frac{A_m}{A_c}$$

Substituting the values,

$$\mu = \frac{1}{2}$$

Hence,

$$\boxed{\mu=\frac{1}{2}}$$

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