A coil of area `A`, turns `N` and carrying current `i` is placed with its face parallelt to the lines of magnetic induction `B`. The work done in rotating the coil through an angle of `180^(@)` is

A magnetic dipole is placed at right angles to the direction of lines of force of magnetic induction B. If it is rotated through an angle of 180^(@) then the work done is

A circular coil of radius 4 cm has 50 turns. In this coil a current of 2 A is flowing. It is placed in a magnetic field of 0.1 weber//m^(2). The amount of work done in rotating it through 180^(@) from its equilibrium position will be

Figure shows a coil of area A and N turns with a current I is placed in a uniform magnetic induction B. Find the work required to pull this coil out from magnetic field.

A circular coil of radius 4 cm has 50 turns. In this coil a current of 2 A is flowing. It is placed in a magnetic field of 0.1 "weber"//m^(2) . The amount of work done is rotation it through 180 ^(@) from its equilibrium position will be

A coil of self inductance 20 mH, having 50 turns, carries a current of 300 mA. If the area of the coil is 2cm^(2) , the magnetic induction at the centre of the coil is

The magnetic induction at the center of a circular coil carrying current is