Derive an expression for the magnetic induction at a point on the axial line of a bar magnet.

Derive an expression for the magnetic field at a point on the axis located at a distance x from the centre of a magnetic dipole of length 2l and magnetic moment M.

Find magnetic induction at C.

Derive the expression for the electric potential at any point along the axial line of an electric dipole.

Using Biot-Savart’s law, derive an expression for magnetic field at any point on axial line of a current carrying circular loop. Hence, find magnitude of magnetic field intensity at the centre of circular coil.

The magnetic induction at centre O Fig.

Magnetic induction at the point O in the adjacent figure is

Magnetic length of a bar magnet is

Unit of magnetic induction field B is

The magnetic induction at the point O, if the wire carries a current I, is

The dimensional formula of magnetic induction B is