Magnets and Electromagnets

Front

What is a magnet?

Back

A magnet is an object that produces a magnetic field, attracting certain metals like iron, nickel, and cobalt.

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet that is created by electric current, which can be turned on and off.

Front

How can the strength of an electromagnet be changed?

Back

The strength of an electromagnet can be changed by adjusting the amount of electric current flowing through it or by changing the number of coils of wire.

Front

What happens when like poles of two magnets are brought together?

Back

Like poles repel each other.

Front

What happens when opposite poles of two magnets are brought together?

Back

Opposite poles attract each other.

Front

What is the magnetic field?

Back

The magnetic field is the area around a magnet where magnetic forces can be felt.

Front

What materials are attracted to magnets?

Back

Materials like iron, nickel, and cobalt are attracted to magnets.

Front

What is the Earth's magnetic field?

Back

The Earth's magnetic field is a magnetic field that extends from the Earth's interior out into space, protecting the planet from solar winds.

Front

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

Back

A permanent magnet maintains its magnetic properties without the need for electric current, while an electromagnet requires electric current to generate a magnetic field.

Front

What is magnetic polarity?

Back

Magnetic polarity refers to the direction of the magnetic field, which has a north and south pole.