A rod of length `l` having uniformly distributed charge `Q` is rotated about one end with constant frequency `f` Its magnetic moment

A uniform rod of mass M and length L carrying a charge q uniformly distributed over its length is rotated with constant velocity w about its mid point perpendicular to the rod. Its magnetic moment is

A uniform rod of mass M and length L carrying a charge q uniformly distributed over its length is rotated with constant velocity w about its mid point perpendicular to the rod. Its magnetic moment is

A uniformly charged solid sphere a mass M, radius R having charge Q is rotated about its diameter with frequency f_0 . The magnetic moment of the sphere is

A uniformly charged solid sphere a mass M, radius R having charge Q is rotated about its diameter with frequency f_0 . The magnetic moment of the sphere is

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 thin-ring of radius R metre has charge q coulomb uniformly spread on it . The ring rotates about its axis with a constant frequency of f revolution//s .The value of magnetic induction in omegabm^-2 at the centre of the ring is :