How Does The Generator Generate The Electricity?

The motor spins magnets through coil wrapped around magnets causing an electromagnetic field which is picked up through the wires.

In generator, the other forms of energy are changed to the electrical form. The most important law required to understand the generation of electricity from the generator states as "If a magnetic material is moved inside a magnetic field, an emf (one can understand it as voltage) is induced in it". In generators usually mechanical energy is converted to electrical energy.

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.

It basically works on the principle that when an armature of iron is rotated between the opposite  poles of two different magnets an electric current starts to flow in the armature(loop) in the direction as per Fleming's Right Hand Rule.