A thin circular disk of radius `R` is uniformly charged with density `sigma gt 0` per unit area.The disk rotates about its axis with a uniform angular speed `omega`.The magnetic moment of the disk is :

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 :

Consider a nonconductiing disc of radius r and mass m which has a charge q distributed uniformly over it. The disk is rotated about its axis with an angluar speed omega .Magnetic moment of the disc is 1/Nqomegar^(2) .then find value of N .

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 flat disc of radius R charged uniformly on its surface at a surface charge density sigma . About its central axis of rotation it rotates at an angular speed omega . Find the magnetic moment of disc due to rotation of charges.

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.

An infinite cylinder of radius r with surface charge density sigma is rotated about its central axis with angular speed omega . Then the magnetic field at any point inside the cylinder is

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.