The voltage of an AC source varies with ...

The voltage of an AC source varies with time according to the relation: ` E = 120 sin 100 pi t cos 100 pi t V`. What is the peak voltage of the source?

A

120 volts, 100 Hz

B

`120/sqrt(2)`volts, 100 Hz

C

60 volts, 200 Hz

D

60 volts, 100 Hz

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The correct Answer is:

d

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