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Questions  >>  CBSE XII  >>  Physics  >>  Communication systems
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A carrier wave of Peak voltage $12\;v$ 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 $75\%$

$\begin{array}{1 1} 9\;v \\ 0.9\;v \\ 90\;v \\ 0.09\;v \end{array} $

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