Electromagnets

Front

What are the ends of a magnet called?

Back

North and South poles

Front

What happens if you reverse the electrical current by switching the wire ends?

Back

It reverses the direction of the magnetic field.

Front

What kind of magnet can be turned on and off?

Back

Electromagnet

Front

Magnets on refrigerators cannot be turned off. Which type of magnets are they?

Back

Permanent magnets.

Front

A magnet that gets its magnetism from flowing electrical current is called an electromagnet. True or False?

Back

True.

Front

What is an electromagnet?

Back

A type of magnet where the magnetic field is produced by an electric current.

Front

What materials are commonly used to make electromagnets?

Back

Copper wire and iron cores.

Front

How can the strength of an electromagnet be increased?

Back

By increasing the current or adding more coils of wire.

Front

What is a permanent magnet?

Back

A magnet that maintains its magnetic properties without the need for an external power source.

Front

What is the role of the core in an electromagnet?

Back

The core enhances the magnetic field produced by the electric current.