5.4 Electricity Review

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 consists of a coil of wire, often wrapped around a core of ferromagnetic material.

Front

What is a closed circuit?

Back

A closed circuit is a complete electrical loop that allows electricity to flow. It has no breaks or gaps.

Front

What is an open circuit?

Back

An open circuit is a broken electrical loop that prevents electricity from flowing. It has a gap or break in the path.

Front

What is the role of a dry cell in a circuit?

Back

A dry cell is a type of battery that provides the electrical energy needed to power a circuit.

Front

What is an insulator?

Back

An insulator is a material that does not allow electricity to flow through it easily. Examples include rubber and plastic.

Front

What is a conductor?

Back

A conductor is a material that allows electricity to flow through it easily. Examples include copper and aluminum.

Front

How does a lightbulb work in a circuit?

Back

A lightbulb works by allowing electricity to flow through a filament, which heats up and produces light when the circuit is closed.

Front

What happens when a wire touches an insulator in a circuit?

Back

If a wire touches an insulator, it can break the circuit, preventing electricity from flowing and causing devices like lightbulbs to not work.

Front

What is the purpose of a switch in a circuit?

Back

A switch is used to open or close a circuit, allowing or stopping the flow of electricity.

Front

What is the function of the iron core in an electromagnet?

Back

The iron core enhances the magnetic field produced by the electric current in the coil, making the electromagnet stronger.