When a wire is moved up and down in a magnetic field, a current is induced in the wire. What is this phenomenon known as?

State whether the following statements are true or false:

(a) A generator works on the principle of electromagnetic induction.

(b) A motor works on the principle of electromagnetic induction.

What is the function of brushes in an electric generator?

When current is 'switched on' and 'switched off' in a coil, a current is induced in another coil kept near it.

What is this phenomenon known as?

What is the major difference between the simple alternator and most practical alternators?