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The coefficient of induction of a choke ...

The coefficient of induction of a choke coil is `0.1 H` and resistance is `12 Omega`. If it is connected to an alternating current source of frequency `60 Hz`, then power factor will be

A

`0.32`

B

`0.30`

C

`0.28`

D

`0.24`

Text Solution

Verified by Experts

The correct Answer is:
B
`cos varphi=R/Z=R/(sqrt(R^(2)+omega^(2)L^(2)))`
`=12/(sqrt((12)^(2)+4xxpi^(2)xx(60)^(2)xx(0.1)^(2)))implies cos varphi=0.30`
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