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A circular current loop of magnetic mome...

A circular current loop of magnetic moment M is in an arbitary orientation is an external magnetic field `vec B`. The work done to rotate the loop by `30^@` about an axis perpendicular to its plane is….

A

MB

B

`sqrt3/2 MB`

C

`(MB)/2`

D

zero

Text Solution

Verified by Experts

`W=mB(cos theta_1-cos theta_2)`
`=mB(cos0^@-cos30^@)`
`=mB(1-sqrt3/2)`
`=((2-sqrt3)/2)mB`
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