Derive the equation for the couple acting on a bar magnet in a uniform magnetic field and hence deduce the definition of "magnetic moment".

Torque acting on a current loop in a uniform magnetic field is equal to

In a uniform magnetic field, the field lines are :

Deduce an expression for torque acting on a bar magnet placed in uniform external magnetic field.

Magnetic length of a bar magnet is

(a) Derive the expression for the torque acting on a current carrying placed in a magnetic field. (b) Explain the significance of a radial magnetic when current carrying coil is kept in it.

The magnetism of a bar magnet is due to

A charged particle enters a uniform magnetic field perpendicular to it. The magnetic field

A magnetic needle is kept in a non uniform magnetic field . It experiences

A magnetic needle is kept in a non uniform magnetic field . It experiences

When a current carrying coil is placed in a uniform magnetic field with its magnetic moment anti-parallel to the field.