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Questions  

An iron rod of length L and magnetic moment ‘M’ is bent in the form of an arc and it makes an angle 60o  at the centre. Its new magnetic moment will be  

a
2Mπ
b
c
3Mπ
d
5Mπ

detailed solution

Correct option is C

M'=2Msinθ2θ=2Msin6002π3=3Mπ

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