Two circular coils of wire each having a radius of `4cm` and `10 turns` have a common axis and are `3cm` apart If a current of `1A` passes through each coil in the opposite direction find the magnetic induction
(i) At the center of either coil
(ii) At a point on the axis, midway between them .

Two identical circular coils of radius 0.1m, each having 20 turns are mounted co-axially 0.1m apart. A current of 0.5A is passed through both of them (i) in the same direction, (ii) in the opposite directions. Find the magnetic field at the centre of each coil.

Two long straight parallel conductors 10 cm apart, carry currents of 5A each in the same direction. Then the magnetic induction at a point midway between them is

A current of 1 A passes through a circular coil of 120 turns, each of radius 50 cm. What is the magnetic moment of the coil?

A circular coil of wire is made phi of 100 turns, each of radius 8 cm if a current of 0.4A passes through of, what will be the magnetic field at the centre of the coil

The radius of each of two circular coils of single turn is r. The two coils are placed parallel to each other with a common axis. The distance between their centres is (r)/(2) . If equal current is sent through the two coils in the same direction, what will be the magnetic field (i) at the centre of each coil and (ii) at the mid point on the line joining the centres of the coils? What is the ratio of these two magnetic fields?

A current of 10 amp. Flows through a 20 turns flat circular coil of radius 5 cm. Find the field inductions ( vecB) at the centre of the coil.

A circular coil of average radius 6 cm has 20 turns. A current 1.0 A is set up through it. Find the magnetic induction at (i) The centre of the coil