Magnetostatic potential energy of a magnet with magnetic dipole moment `overset(to)(m)`, in a uniform magnetic field `overset(to)(B)` is given as …...

Options

A. `overset(to)(m).overset(to)(B)`
B. `overset(to)(m) xxoverset(to)(B)`
C. `- (overset(to)(m).overset(to)(B) )`
D. `-(overset(to)(m) xx overset(to)(B) )`

Answer

C

Explanation

We have an expression `U= - m B cos theta`
`therefore U= - overset(to)(m).overset(to)(B)`