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.

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 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 dielectric circular disc of radius R carries a uniform surface charge density sigma . If it rotates about its exis with angular velocity omega , the magnetic field at the cente of disc 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 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 sphere of radius R, uniformly charged with the surface charge density sigma rotates around the axis passing through its centre at an angular velocity. (a) Find the magnetic induction at the centre of the rotating sphere. (b) Also, find its magnetic moment.

A sphere of radius R, uniformly charged with the surface charge density sigma rotates around the axis passing through its centre at an angular velocity. (a) Find the magnetic induction at the centre of the rotating sphere. (b) Also, find its magnetic moment.

A non-conducting disc having unifrom positive charge Q , is rotating about its axis with unifrom angular velocity omega .The magnetic field at the centre of the disc is.