A plastic disc of radius `'R'` has a charge `'q'` uniformly distributed over its surface. If the dis is rotated with a frequency `'f'` about its axis, then the magnetic induction at the centre of the disc is given by

Charge q is uniformly distributed on a disc of radius r. If the disc is rotated with a frequency v, then magnetic field induction at the centre will be

A hollow sphere has charge 'q' which is uniformly distributed over its surface and rotating about its axis .Find the magnetic moment of the sphere

A non-conducting thin disc of radius R and mass m having charge uniformly over one side with surface density sigma rotates about its axis with an angular velocity omega . Find : (a) the magnetic induction at the centre of the disc, (b) the magnetic moment of the disc. ( c) the ratio of magnetic moment and angular momentum of disc.

A non-conducting thin disc of radius R charged uniformly over one side with surface density s rotates about its axis with an angular velocity omega . Find (a) the magnetic induction at the centre of the disc, (b) the magnetic moment of the disc.

A non-conducting thin disc of radius R charged uniformly over one side with surface density s rotates about its axis with an angular velocity omega . Find (a) the magnetic induction at the centre of the disc, (b) the magnetic moment of the disc.

A thin disc of radius R has charge Q distributed uniformly on its surface. The disc is rotated about one of its diametric axis with angular velocity omega . The magnetic moment of the arrangement is

A thin disc of radius R has charge Q distributed uniformly on its surface. The disc is rotated about one of its diametric axis with angular velocity omega . The magnetic moment of the arrangement is

A non-conducting thin disc of radius R charged uniformly over one side with surface density sigma , rotates about its axis with an angular velocity omega . Find (a) the magnetic field induction at the centre of the disc (b) the magnetic moment of the disc.

Calculate potential on the axis of a disc of radius R due to a charge Q uniformly distributed on its surface.