Generators don’t actually create electricity. Instead, they convert mechanical
or chemical energy into electrical energy. They do this by capturing
the power of motion and turning it into electrical energy by forcing electrons from the external source through an electrical circuit. A generator is essentially an electrical motor working in reverse. How Do Generators Create Electricity?
A generator usually consists of two parts. One is moving part and the other is stationary part. The moving part is named as rotor and the stationary part is referred as the stator. The stator is usually a fixed magnet providing the magnetic field to induce the emf in the moving magnetic material. The rotary part is moved inside the stator.
This produces and e.m.f in induced in the rotary part which is taken out by means of brushes and slip rings. There are other parts, like commutator and windings are also there to provide various jobs. In synchronous type of generators the process is opposite. In synchronous type of generators, e.m.f. is induced in the stationary part instead of rotary part. Synchronous generator produces A.C. form of electricity and the 1st described type of generator produces D.C form of electricity.