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A coil having N turns is wound tightly i...

A coil having N turns is wound tightly in the form of a spiral with inner and outer radii a and b respectively. A current I passes through the coil. The magnetic moment of the spriral is

A

`(mu_(0)NI)/(b)`

B

`(2mu_(0)NI)/(a)`

C

`(mu_(0)NI)/(2(b-a))"In" (b)/(a)`

D

`(2mu_(0)I^(N))/(2(b-a))"In"(b)/(a)`

Text Solution

Verified by Experts

The correct Answer is:
C
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