Electromagnetism

Front

What is electromagnetism?

Back

Electromagnetism is the branch of physics that deals with the relationship between electricity and magnetism.

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet that is created by an electric current passing through a coil of wire.

Front

What is the relationship between electricity and magnetic fields?

Back

Electricity always creates a magnetic field.

Front

How can you turn an electromagnet on and off?

Back

By controlling the electric current flowing through the wire.

Front

What materials are typically used to create an electromagnet?

Back

An iron core wrapped with electric wire.

Front

What happens to the magnetic strength of an electromagnet as the current increases?

Back

As current increases, magnetic strength increases.

Front

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

Back

The iron core enhances the magnetic field created by the electric current.

Front

How can a magnet produce an electric current?

Back

By spinning the magnet around inside a coil of wire.

Front

What is a permanent magnet?

Back

A permanent magnet is a magnet that maintains its magnetic properties without the need for an electric current.

Front

What is the difference between a permanent magnet and an electromagnet?

Back

A permanent magnet is always magnetized, while an electromagnet can be turned on and off with electric current.