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  4. A square wave of the modulating signal is shown in the figure. The carrier wave is given by C ( t )=5 sin (8 π t ) Volt. The modulation index is:

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Q. A square wave of the modulating signal is shown in the figure. The carrier wave is given by
$C ( t )=5 \sin (8 \pi t )$ Volt. The modulation index is:Physics Question Image

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Solution:

Modulation Index $\mu=\frac{A_m}{A_C}=\frac{1}{5}=0.2$
$A_m=a m p$. of modulating signal
$A _{ C }=$ amp. of carrier wave