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$V_m=20\sin [100\pi t +{\pi\over4}]$

$V_c=80\sin [10^4t+{\pi\over6}]$

For amplitude modulation wave find out percentage modulation index.

Numerical Value Type

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Communication systems, Amplitude modulation

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Ans. 25

Sol. $m\% = {A_m\over A_c}\times100={20\over80}×100=25\%$

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