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A circular current loop of magnetic mome...

A circular current loop of magnetic moment `M` is in an arbitrary orientation in 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

`sqrt(3MB)/(2)`

C

`(MB)/(2)`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
D
When the loop is rotate d by `30^(@)`b about an axis perpendicualr to its plane the angle made by the axis of the loop with the direction of the magnetic fiedl does not change
`therefore` The work done in ratating the loop is zero
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