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 can be turned on and off.

Front

How does an electromagnet differ from a permanent magnet?

Back

An electromagnet's magnetic field can be controlled by turning the electric current on or off, while a permanent magnet has a constant magnetic field.

Front

What creates a magnetic field?

Back

A magnetic field is created by moving electric charges, such as those found in electric currents.

Front

What is the Earth's magnetic field similar to?

Back

The Earth's magnetic field is similar to that of a bar magnet, with a North and South Pole.

Front

What type of magnet are refrigerator magnets?

Back

Refrigerator magnets are permanent magnets.

Front

What happens to the magnetic field when the electric current in an electromagnet is turned off?

Back

The magnetic field disappears when the electric current is turned off.

Front

What is the geographic North Pole?

Back

The geographic North Pole is the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface.

Front

What is the relationship between Earth's magnetic South Pole and geographic North Pole?

Back

Earth's magnetic South Pole is located near the geographic North Pole.

Front

What is a magnetic field?

Back

A magnetic field is a region around a magnet where magnetic forces can be detected.

Front

What role do moving particles with electric charge play in creating magnetic fields?

Back

Moving particles with electric charge, such as electrons in a wire, create magnetic fields when they move.