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A circular coil of diameter 7cm has 24 t...

A circular coil of diameter `7cm` has 24 turns of wire carrying current of `0.75A`. The magnetic moment of the coil is

A

`6.9 xx 10^(-2) A - m^(2)`

B

`2.3 xx 10^(-2) A - m^(2)`

C

`10^(-2) A - m^(2)`

D

`10^(-3) A - m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
As, `M = NiA = 24 xx 0.75 xx 3.14 xx (3.5 xx 10^(2))^(2)`
`rArr " " M=6.9 xx 10^(-2) A - m^(2) `
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