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A wire length 6.28m is bent into a circu...

A wire length `6.28m` is bent into a circular coil of 2 turns. If a current of `0.5A` exists in the coil, the magnetic moment of the coil is, in `Am^(2) :`

A

`pi/4`

B

`1/4`

C

`pi`

D

`4pi`

Text Solution

Verified by Experts

The correct Answer is:
A
`M = NI pi r^2 , l = (2pir) N`
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