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Magnetic moment of bar magnet is M. The ...

Magnetic moment of bar magnet is M. The work done to turn the magnet by `90^(@)` of magnet in direction of magnetic field B will be

A

zero

B

`(1)/(2)MB`

C

MB

D

MB

Text Solution

Verified by Experts

The correct Answer is:
D
Work done, `W=MB(1-costheta)`
`" "theta=90^(@)`
`therefore" "W=MB`
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