1.

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

Answer»

`-MB`
`0`
any value
`mB`

SOLUTION :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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