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A generator produces a time varying volt...

A generator produces a time varying voltage given by `V=240 sin 120 t,` where `t` is in second. The rms voltage and frequency are

A

`60Hz` and `240V`

B

`19Hz` and `120V`

C

`19Hz` and `170 V`

D

`754Hz` and `70V`

Text Solution

Verified by Experts

The correct Answer is:
C
`v=(omega)/(2pi)=(120xx7)/(2xx22)=19Hz`
`V_(r.m.s)=240/(sqrt(2))=120sqrt(2)~~170V`
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