The voltage of an ac source varies with time P according to the equ...

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The voltage of an ac source varies with time
P according to the equation \( V=100 \sin 100 \pi t \cos 100 \pi t \)

W where \( t \) is in seconds and \( V \) is in volts. Then
(1) The peak voltage of the source is 100 volts
(2) The peak voltage of the source is 50 volts
(3) The peak voltage of the source is \( 100 / \sqrt{2} \) volts
(4) The frequency of the source is \( 50 \mathrm{~Hz} \)
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