Magnets and Electromagnetism Review

Front

What effect does coiling a wire have on its magnetic field?

Back

Strengthens the magnetic field

Front

What is true about electromagnets?

Back

Their polarities can be reversed.

Front

What happens when you reverse the polarity of an electromagnet?

Back

It changes direction.

Front

What do the lines around this magnet represent?

Back

Magnetic Field

Front

What happens to the magnetic field of an electromagnet when the current is increased?

Back

It increases

Answer explanation

When the current in an electromagnet is increased, the magnetic field strength also increases. This is due to the direct relationship between current and magnetic field intensity, making 'It increases' the correct answer.

Front

The ability of some materials to attract certain metals is called

Back

Magnetism

Front

How can the strength of an electromagnet be increased?

Back

By increasing the number of coils.

Front

What is shown in the picture? Options: Electromagnet, Electric generator, Electric motor, Transformer

Back

Electromagnet

Front

Electromagnet

Back

A magnet created by electric current flowing through wires

Front

Which material would a magnet pick up? Options: Steel, Rubber, Copper, Plastic

Back

Steel