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A circular loop of radius0.05 m carries...

A circular loop of radius0.05 m carriess a current of 1.0 A. The magnetic moment of the loop is .

A

`1.32 xx 10^(-4) A- m^(2)`

B

`7.85 xx 10^(-4) A - m^(2)`

C

`2.62 xx 10^(-4) A - m^(2)`

D

`525 xx 10^(-4) A - m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`M = lA = 0.1 xx pi xx (0.05)^(2)`
`rArr " " M = 0.1 xx 3.14 xx 25 xx 10^(-4) = 7.85 xx 10^(-4) A - m^(2)`
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