The different ways to induce current in a coil are as follows:
(i) If a coil is moved rapidly between the two poles of a horse-shoe magnet, then an electric current is induced in the coil.
(ii) If a magnet is moved relative to a coil, then an electric current is induced in the coil.
(iii) By keeping it stationary and rotating a magnet inside it, the current in the coil can be induced.
(iv) In a coil, the current may be caused by constantly altering the current in ‘another coil’ held near it.