6.ELECTROMAGNETIC MECHANISMS:
Electromagnetic mechanisms are devides that can convert movement into electricity or vice versa.In other words,they use electromagnetic phenomena to produce electricity or convert it into mechanical energy.

6.1.ELECTROMAGNETIC GENERATORS:
Electromagnetic generators transform mechanical energy into electricity.There are two types:Dynamos and alternators.

DYNAMOS:Consists of a magnet and rotary coil.The coil is located between the two poles of the magnet. The ends of the coil have two semi-circular conductors,which form the commulator.These conductors are attached to carbón brushes, which in turn are conneted to electrical wires.When electricity is applied to the coil,it rotates and begins to generate direct current in the coil.









ALTERNATORS:A simple alternator is almost identical to a dynamo,except for the commutator,which consists of two metallic rings connected to carbón brushes.Instead of direct current,this produces alternating current.