Tag: ac generator

If a powerful electromagnet is used instead of a permanent magnet, magnetic field strength increases. This increase in magnetic field strength leads to the increase in induced voltage in the coil. An increased voltage leads to an increased induced current in the generator.

The only difference between a DC generator and an AC generator is in the way the two ends of the generator coil are linked to the outer circuit.

A device that reverses the direction of flow of current through a circuit is called a commutator. In electric motors, the split ring acts as a commutator.

AC generator produces alterating current which reverses its direction continuously. It is also h/a alternator.

An electric generator is classified on the basis of type of electric current it produces

Voltage/current produced in a generator can be increased by:
a) Using a powerful electromagnet to make the magnetic field stronger in place of a permanent magnet.
b) By winding the coil round a soft iron core to increase the strength of magnetic field.
c) By using a coil with more turns.
d) By rotating the coil faster.
e) By using a coil with a larger area.

Dynamo is a type of electrical generator and produces dc current as output.

A dynamo consists of 
1) A horse-shoe magnet 
2) An armature coil 
3) Two slip rings
4) Two carbon brushes
5) The external circuit (or load)

A dynamo consists of 
1) A horse-shoe magnet 
2) An armature coil  
3) Two slip rings
4) Two carbon brushes
5) The external circuit (or load)

A dynamo is a device which converts mechanical energy into electrical energy.