A bar magnet of magnetic moment 2.0 A m^...

A bar magnet of magnetic moment `2.0 A m^2` is free to rotate about a vertical axis through its centre. The magnet is released from rest from the east-west position. Find the kinetic energy of the magnet as it takes the north-south position. The horizontal component of the earth's magnetic field is `B = 25 muT`.

`25muJ`

`50muJ`

`100muJ`

`12.5muJ`

Text Solution

Verified by Experts

The correct Answer is:

`W=MB(costheta_(1)-costheta_(2))`

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NARAYNA-MAGNETISM-LEVEL-I(C.W)

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