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A long thin magnet of moment M is bent i...

A long thin magnet of moment `M` is bent into a semi circle. The decrease in the magnetic moment is

A

`2M//pi`

B

`piM//2`

C

`M(pi-2)//pi`

D

`M(2-pi//2)`

Text Solution

Verified by Experts

The correct Answer is:
C

`M =(2M)/pi`, decrease in magnetic moment
`= M - (2M)/pi`
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