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For most stable position of magnetic dip...

For most stable position of magnetic dipole in a uniform magnetic field the value of potential energy should be .......

A

`-mB`

B

`0`

C

any value

D

`mB`

Text Solution

Verified by Experts

The correct Answer is:
A
Potential energy of dipole in magnetic field B,
`U= - overset(to)(m) .overset(to)(B) = - m B cos theta`
it becomes steady when `theta = 0^@` ,
`therefore U= -mB " "[because cos 0^(@) =1]`
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