Science, asked by kavyabagadia0, 2 months ago

Explain the underline principle on which it works.​

Answers

Answered by seema6127
1

Answer:

In an electric generator, mechanical energy is used to rotate a conductor in a magnetic field to produce electricity. It is working on the principle of electromagnetic induction.

Working:

When the axle attached to the two rings is rotated such that the arm

AB

moves up (and the arm

CD

moves down) in the magnetic field produced by the permanent magnet. Let us say the coil

ABCD

is rotated clockwise in the arrangement. By applying Fleming’s right hand rule, the induced currents are set up in these arms along the directions

AB

and

CD

. Thus an induced current flows in the direction

ABCD

. If there are larger number of turns in the coil, the current generated in each turn adds up to give a large current through the coil. This means that the current in the external circuit flows from

B

2

and

B

1

.

After half a rotation, arm

CD

starts moving up and

AB

moving down. As a result, the directions of the induced currents in both the arms changes, giving rise to the net induced current in the direction

DCBA

. The current in the external circuit now flows from

B

1

to

B

2

. Thus after every half rotation the polarity of the current in the respective arms changes.

There are two brushes and in the electric generator, one brush is at all times in contact with the arm moving up in the field, while the other is in contact with the arm moving down. Because of these Brushes unidirectional current is produced.

Explanation:

hopeit will help you

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