Question

Explain different ways to induce current in a coil.

Answer 1

The different ways to induce current in a coil are as follows: (i) Moving a magnet towards a coil sets up a current in the coil circuit, (ii) If acoil is moved rapidly between the two poles of a horse-shoe magnet, then an electric current is induced in the coil.

Answer 2

1) If a magnetic field is changed round a coil then an induced current is set up in the coil. It can be done by taking a bar magnet and bringing it closer to the coil or taking it away from the coil.

(2) If a coil is moved in a magnetic field, then again an induced current is set up in the coil.

(3) If a coil is rotated in a uniform magnetic field, it may also cause an induced current in the coil.

(4) If we take two coils and insert them over a non conducting cylindrical roll then on changing current flowing in one coil, an induced current is obtained in the other coil.