ELECTRIC GENERATORMechanical Electrical Energy Energy

G

INVENTOR OF GENERATOR

WHAT IS ELECTRIC GENERATOR?

An Electric generator is an

device in which mechanical

energy is used to rotate a

conductor in an area of magnetic

field to generate electricity.

Electric generator is based on the

phenomenon of electro magnetic induction.

It is based on the principle of Fleming's

right hand rule.

PARTS OF GENERATOR

It consist of:

1. Permanent magnets 2.

Galvanometer

3. Rotating rectangular coil 4. Rings

5. Brushes 6. Axle

WORKING OF ELECTRIC GENERATOR

When the axle attach to the

rings is rotated such that one

arm moves up and other

moves down in the magnetic

field produced by permanent

magnet.

By applying Fleming right

hand rule the induced currents

are set up in this arms along

there direction.

Thus an induced current flows through the

direction of the ABCD .

After half a rotation, arm CD starts moving up and

AB moving down.

As a result, the directions of the induced currents

in both arms change, giving rise to net induced

current.

AC CURRENT

The current which can change its direction is

called AC Current

DO YOU KNOW

Electricity supplied to our homes, school

buildings, company buildings etc. is AC, which

reverses its direction after every second with a

frequency of 50 Hz

Most power stations in the world generate AC than

DC. This is because AC can be transmitted over

very long distances without much loss of energy.

AC GENERATOR

After each half-rotation, the direction

of the induced current is reversed. An

AC reverses its direction after equal

time intervals. A machine with this

arrangement is called an AC generator.

DC CURRENT

The current which flows in only one direction and is

an unidirectional current called direct current

(DC).

DO YOU KNOW :

Direct current may be obtained from an

alternating current supply by use of a

current-switching arrangement called a

rectifier, which contains electronic elements

(usually) or electromechanical elements

(historically) that allow current to flow only

in one direction.

DC GENERATOR

Moving first in one direction, then in the other.

Each end of the coil is attached to a separate

metal slip ring that rotates with the coil.

Brushes that rest on the slip rings are attached

to the external circuit. Thus the current flows

from the coil to the slip rings, then through the

brushes to the external circuit. A machine with

such an arrangement is called a DC generator.

MADE BY :

KRISHNA U. HIWALE

YAHAYA K. KHAN

RUSHIKESH G. RATHOD

VAIBHAV A. KULKARNI

GUIDED BY

*****NEETHI

MAM*****

*PHYSICS*