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A short bar magnet of magnetic moment 0*...

A short bar magnet of magnetic moment `0*4JT^-1` is placed in a uniform magnetic field of `0*16T`. The magnet is in stable equilibrium when the potencial energy is

A

`-0.064 J`

B

zero

C

`-0.082 J`

D

0.064 J

Text Solution

Verified by Experts

The correct Answer is:
A
For state equilibrium
`U=-MB`
`=-(0.4) (0.16)`
`=-0.064 J`
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