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 do electromagnets differ from regular magnets?

Back

Electromagnets can be turned off and on, their polarity can be reversed, and their strength can be changed.

Front

What happens to the force between two magnets as the distance between them increases?

Back

The force between two magnets decreases as the distance between them increases.

Front

What is responsible for the magnetic field around Earth?

Back

The Earth's molten iron core is responsible for the magnetic field around Earth.

Front

What do the lines around a magnet represent?

Back

The lines around a magnet represent the magnetic field.

Front

What is the North Pole of a magnet?

Back

The North Pole of a magnet is the end that points towards the Earth's geographic North when freely suspended.

Front

What is the South Pole of a magnet?

Back

The South Pole of a magnet is the end that points towards the Earth's geographic South when freely suspended.

Front

What is magnetic declination?

Back

Magnetic declination is the angle between magnetic north and true north.

Front

What is the relationship between electric current and magnetism?

Back

Electric current produces a magnetic field, which is the principle behind electromagnets.

Front

What is the strength of a magnetic field measured in?

Back

The strength of a magnetic field is measured in teslas (T).