The magnetic field induction is……………..for a point on the surface of solid cylinder carrying current and is………………….for a point on the axis of the cylinder.

The magnetic field induction at a point due to a current element is given by

Find the force per unit area on the surface of a long hollow cylinder carrying uniform current I and radius of the cylinder is R.

Find the force per unit area on the surface of a long hollow cylinder carrying uniform current I and radius of the cylinder is R.

Find the magnetic field induction at a point on the axis of a circular coil carrying current and hence find the magnetic field at the centre of circular coil carrying current.

Find the magnetic field induction at a point on the axis of a circular coil carrying current and hence find the magnetic field at the centre of circular coil carrying current.

A hollow cylindrical conductor of inner radius a and outer radius b carries a current I uniformly spread over its cross-section. Find the magnetic field induction at a point inside the body of the conductor at a distance r [where a lt r lt b ] from the axis of the cylinder.

Write the relation for the magnetic field induction at a point due to a linear conductor carrying current and hence deduce the relation for the magnetic field induction at a point due to a very long linear conductor carrying current.