The voltage of an \( A C \) source varies with time according to th...

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The voltage of an \( A C \) source varies with time according to the equation, \( V=100 \sin 100 \pi \mathrm{t} \cos 100 \pi \mathrm{t} \). Where \( t \) is in second and \( \mathrm{V} \) is in volt. Then :
(A) the peak voltage of the source is 100 volt
(B) the peak voltage of the source is \( (100 / \sqrt{2}) \) volt
(C) the peak voltage of the source is 50 volt
(D) the frequency of the source is \( 50 \mathrm{~Hz} \)
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