Forces at a Distance

Front

What is a magnet?

Back

A magnet is an object that produces a magnetic field, which can attract or repel certain materials, such as iron.

Front

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

Back

They repel each other.

Front

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

Back

They attract each other.

Front

What is the magnetic field?

Back

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

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.

Front

How can the strength of an electromagnet be increased?

Back

The strength of an electromagnet can be increased by increasing the electric current, adding more coils of wire, or using a ferromagnetic core.

Front

What is the role of the cone/membrane in a speaker system?

Back

The cone/membrane vibrates to produce sound when an electrical signal is applied.

Front

What is the attractive force in magnets?

Back

The attractive force is the pull that occurs between opposite poles of magnets.

Front

What materials are typically attracted to magnets?

Back

Materials such as iron, nickel, and cobalt are typically attracted to magnets.

Front

What is the difference between permanent magnets and temporary magnets?

Back

Permanent magnets maintain their magnetic properties over time, while temporary magnets only exhibit magnetism when in a magnetic field.