The intensity of a magnetic field is H and moment of magnet is M. The maximum potential energy is

Options

A. MH
B. 2MH
C. 3MH
D. 4MH

Answer

A

Explanation

`P.E= -MH cos theta ,` For max : value of P.E, `theta=180^(@)`
`:." Max P.E=-MH cos theta = -MH cos 180^(@)= MH`