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The power in ac circuit is given by P=E(...

The power in ac circuit is given by `P=E_(rms)I_(rms)cosphi`. The vale of cos phi in series LCR circuit at resonance is:

A

zero

B

1

C

`(1)/(2)`

D

`(1)/(sqrt(2))`

Text Solution

Verified by Experts

The correct Answer is:
B
`cos phi = (R )/(Z) = (R )/(R ) = 1`
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