Electromagnets

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It consists of a coil of wire, often wrapped around a ferromagnetic core.

Front

What is a solenoid?

Back

A solenoid is a coil of wire that generates a magnetic field when an electric current passes through it.

Front

What materials can be used as a ferromagnetic core?

Back

Common ferromagnetic materials include iron, nickel, and cobalt.

Front

What happens to the magnetic field when the current in a solenoid is increased?

Back

The strength of the magnetic field increases.

Front

How does a compass work in relation to magnetic fields?

Back

A compass aligns itself with the Earth's magnetic field, pointing towards magnetic north.

Front

What is the effect of reversing the current in a solenoid?

Back

Reversing the current in a solenoid reverses the direction of the magnetic field.

Front

What is the relationship between electricity and magnetism?

Back

Electricity and magnetism are interconnected; an electric current produces a magnetic field, and a changing magnetic field can induce an electric current.

Front

What happens to a compass when it is placed near a current-carrying wire?

Back

The compass needle will deflect from its original position due to the magnetic field created by the current in the wire.

Front

What is the role of the ferromagnetic core in an electromagnet?

Back

The ferromagnetic core enhances the magnetic field produced by the coil of wire, making the electromagnet stronger.

Front

What is the principle of electromagnetic induction?

Back

Electromagnetic induction is the process by which a changing magnetic field can induce an electric current in a conductor.