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As loop of magnetic moment M is placed i...

As loop of magnetic moment `M` is placed in the orientation of unstable equilbirum position in a uniform magnetic field `B`. The external work done in rotating it through an angle `theta` is

A

`-MB(1-costheta)`

B

`-MB(costheta)`

C

`MBcos theta`

D

`MB(1-costheta)`

Text Solution

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The correct Answer is:
A
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