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

60 V

B

120V

C

30V

D

`sqrt(2)V`

Verified by Experts

The correct Answer is:

A

`E=120 sin 100 pi t cos 100 (pi)t=60 sin(200 pi t)`
So peak voltage `E_(0)=60V`.

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