Electricity and Magnetism

Front

What is a magnetic field?

Back

A magnetic field is an invisible field around a magnet where magnetic forces can be detected.

Front

Where is the magnetic field strongest?

Back

The magnetic field is strongest at both poles of a magnet.

Front

What happens to the brightness of bulbs when a circuit wire is changed from thick to thin?

Back

The bulbs become dimmer.

Front

How can you make an electromagnet stronger?

Back

You can make an electromagnet stronger by increasing the number of loops in the wire.

Front

What device converts mechanical energy into electrical energy?

Back

An Electric Generator converts mechanical energy into electrical energy.

Front

In which direction does electricity flow in a circuit?

Back

Electricity flows from negative to positive.

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

What is the role of a battery in a circuit?

Back

A battery provides the electrical energy needed to power the circuit.

Front

What is resistance in an electrical circuit?

Back

Resistance is a measure of the opposition to the flow of electric current.

Front

What is the unit of electric current?

Back

The unit of electric current is the Ampere (A).