Magnetic fields

Front

What happens to a permanent magnet when it is forcefully vibrated?

Back

It can lose its magnetic field because the domains fall out of alignment.

Front

Why does a magnet always have two poles, even if cut in half?

Back

A magnet is made up of tiny magnetic domains that are aligned.

Front

What will happen when a north pole and a south pole of magnets are brought together?

Back

They will attract each other.

Front

Where are magnetic field lines closest together?

Back

At the poles of the magnet.

Front

How can an electromagnet be strengthened?

Back

By running more current through the wire.

Front

What are the two types of magnetic poles?

Back

North pole and South pole.

Front

What is a magnetic domain?

Back

A region within a magnet where the magnetic fields of atoms are aligned.

Front

What is the effect of cutting a magnet in half?

Back

Each half becomes a new magnet with its own north and south poles.

Front

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

Back

It enhances the magnetic field when current flows through the wire.

Front

What is the relationship between electric current and magnetism?

Back

Electric current produces a magnetic field.