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If an alternating voltage is represented...

If an alternating voltage is represented as E = 141 ` sin (628 t ) ` , then the rms value of the voltage and the frequency are respectively:

A

141 V , 628 Hz

B

100 V , 50Hz

C

100 V , 100 Hz

D

141 V, 100 Hz

Text Solution

Verified by Experts

The correct Answer is:
C
` " " E= 141 sin 628 t`
` therefore " " E_(rms) = (E_0)/(sqrt2) `
` " " = (141)/(1.41) = 100 V `
and ` " " v= (omega )/(2pi )`
` " " = (628)/(2xx 3.14) = 100 Hz`
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