A thin conducting ring of radius R has a thin layer of insulation on its inner face. A superconducting ring of radius R is pressed into it. The insulation layer separates the two rings. Find the self inductance of the conducting ring.

A non conducting ring of radius R is charged as shown in figure : Figure

A conducting ring of radius r having charge q is rotating with angular velocity omega about its axes. Find the magnetic field at the centre of the ring.

A conducting ring of radius r having charge q is rotating with angular velocity omega about its axes. Find the magnetic field at the centre of the ring.

A conducting ring of radius r having charge q is rotating with angular velocity omega about its axes. Find the magnetic field at the centre of the ring.

Very thin ring of radius R is rotated about its centre. Its radius will

In the given figure two straight infinite conductors carry a current 1. They are parallel and separated by a distance 2a. A circular conducting ring of radius 'a' in the plane of the parallel wires lies between the two straight conductors and is insulated from them. The mutual inductance between the circular ring and the straight conductors is 2a