Torque on a Bar Magnet placed in a uniform external field

When a bar magnet is placed in a non-uniform magnetic field, it performs

A short bar magnetic is placed in a uniform magnetic field of 0.25 T, with its axis at an angle of 30^(@) with the field. If it experiences a torque of magnitude 4.5xx10^(-2) N m, then its magnetic momentum is

A flexible wire loop is placed in a uniform external magnetic field if current is passed through wire assuming normal magnetic field. What will be the effect on wire.

Derive an expression for potential energy of a bar magnet when placed in an external magnetic field.

A bar magnet is placed inside a uniform magnetic field, What does in experience?

The torque on a rectangular coil placed in a uniform magnetic filed is large when the

Derive an expression for the torque acting on an electric dipole placed in a uniform electric field.