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The work done in rotating a magnet of ma...

The work done in rotating a magnet of magnetic moment `2A-m^(2)` in a magnetic field to opposite direction to the magnetic field, is

A

Zero

B

`2xx10^(-2)J`

C

`10^(-2)J`

D

`10J`

Text Solution

Verified by Experts

The correct Answer is:
B
`W= MB(1-costheta), where theta=180^(@)`
`implies W= 2MB implies W=2xx2xx5xx10^(-3) =2xx10^(-2)J`
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A2Z-MAGNETISM AND MATTER-Section D - Chapter End Test
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