On what effect of an electric current does an electromagnet work?

Name the alloy which is mainly used for making permanent magnets.

Why is electromagnetic induction so called?

Name an instrument in which the directive property of a magnet is used.

What is a solenoid?

Which effect of electric current is utilised in the working of an electric fuse?

what is the frequency of А.С. (alternating current) in India?

What will you do if you see a person coming in contact with a live wire?

How can it be proved that a magnetic field exists around a current carrying metallic

wire?

How is the strength of the magnetic field at a point near a wire related to the

strength of the electric current flowing in the wire?

How is the fuse connected in an electric circuit?

Why is a fuse usually made of tin or tin-copper alloy?

What is the capacity of a fuse commonly used in domestic electrical fittings.

Name the device used to protect the electric circuits from overloading and short

circuiting.

On which effect of electricity does fuse work?

What kind of magnetic field is produced by a current carrying solenoid?

Show, with the help of a diagram, the nature of field lines of magnetic field around a

current carrying straight conductor.

State Faraday's law of electromagnetic induction.

The frequency of alternating current in India is 50 Hz. What does it mean?

Name the scientist who discovered the relationship between electric current and

magnetic field.

What does the closeness of field lines in a magnetic field signify?

Name the device which converts mechanical energy into electrical energy.

Which type of generator is used at power stations?

Does the AC generator have any slip ring?

What is the frequency of DC?