Define magnetic moment of a bar magnet .

The magnetic moment of a bar magnet is equal to the moment of couple when magnet is kept

The magnetic moment of a bar magnet is equal to the moment of couple when magnet is kept

To measure the magnetic moment of a bar magnet, one may use

To measure the magnetic moment of a bar magnet, one may use

To measure the magnetic moment of a bar magnet, one may use

A magnet makes 55 vibrations in one minute where horizontal component of earth's field is 0.36G. If the moment of inertia of the bar magnet is 10^-5 Kgm^2 , find the magnetic moment of the bar magnet.