Electromagnets, Motors and Generators

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 happens to the magnetic strength of an electromagnet as the current increases?

Back

As current increases, the magnetic strength of the electromagnet increases.

Front

What surrounds a wire when electric current is flowing through it?

Back

A magnetic field surrounds the wire.

Front

What is the primary function of a motor?

Back

A motor transforms electrical energy into mechanical energy.

Front

What is the primary function of a generator?

Back

A generator transforms mechanical energy into electrical energy.

Front

What does a transformer do?

Back

A transformer changes the voltage of an electrical signal.

Front

What is the relationship between current and magnetic strength in an electromagnet?

Back

There is a direct relationship; as current increases, magnetic strength increases.

Front

What type of energy transformation occurs in an electrical generator?

Back

The energy transformation in an electrical generator begins as mechanical energy and becomes electrical energy.

Front

What is the role of a magnetic field in electric motors?

Back

The magnetic field interacts with the electric current to produce motion in the motor.

Front

What is the difference between AC and DC motors?

Back

AC motors run on alternating current, while DC motors run on direct current.