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If average power absorbed by induction c...

If average power absorbed by induction coil (L = 1H) is 1W, then the resistance of the coil is :

A

`1 Omega`

B

`2 Omega`

C

`4 Omega`

D

`8 Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
`Z=sqrt((omegaL)^(2)+R^(2))=sqrt(1^(2)+R^(2))`
`lt lt P gt ge1 =i_("rms")^(2) R=((1)/(sqrt(2)))^(2)R,R=2Omega`.
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