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A current of 1 A passes through a circul...

A current of 1 A passes through a circular coil of 120 turns, each of radius 50 cm. What is the magnetic moment of the coil?

A

`45.5 am^(2)`

B

`64.3 Am^(2)`

C

`81.5 Am^(2)`

D

`94.2 Am^(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
Magnetic moment of the coil `(M)=nIA=nI.pir^(2)`
`:. M=120xx1xx3.14xx(1/2)^(2)=30xx3.14=94.2 Am^(2)`
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