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A circular coil of radius 5 cm has 500 t...

A circular coil of radius `5` cm has `500` turns of a wire. The approximate value of the coefficient of self-induction of the coil will be

A

20 mH

B

50 mH

C

52 mH

D

25 mH

Text Solution

Verified by Experts

The correct Answer is:
D
`L=(mu_(0)n^(2)A)/(2a)`
`=(mu_(0)n^(2)pia)/(2)=25mH`
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