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Unit 19: Electromagnetism

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1

Which quantity remains constant in an ideal transformer?

2

The main function of a transformer is to:

3

When the direction of current is reversed, the direction of force:

4

The main principle of an electric motor is:

5

Which law gives magnitude of induced emf?

6

The force on a current carrying conductor in a magnetic field depends on:

7

The induced current flows in such a direction as to oppose the change producing it according to:

8

The split ring in a DC motor is also called:

9

Increasing the number of turns in a coil will:

10

Which device converts electrical energy into mechanical energy?

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