#15 Magnetism

Front

What is a magnetic field?

Back

A magnetic field is the area around a magnet where magnetic forces can be detected.

Front

What type of field does the Earth produce?

Back

The Earth produces its own magnetic field.

Front

What are domains in magnetic materials?

Back

Domains are small regions in magnetic materials where the magnetic fields of atoms are aligned in the same direction.

Front

What happens when two like poles of magnets are brought close together?

Back

They will repel each other.

Front

What happens when two opposite poles of magnets are brought close together?

Back

They will attract each other.

Front

What is the main source of magnetism in materials?

Back

The main source of magnetism in materials is the alignment of electrons.

Front

What is a bar magnet?

Back

A bar magnet is a rectangular piece of magnetized material that has a north and south pole.

Front

What is the difference between a permanent magnet and a temporary magnet?

Back

A permanent magnet retains its magnetism over time, while a temporary magnet only exhibits magnetic properties when in the presence of a magnetic field.

Front

What is the role of magnetic domains in magnetism?

Back

Magnetic domains are responsible for the overall magnetism of a material; when they are aligned, the material becomes magnetized.

Front

What is the unit of measurement for magnetic field strength?

Back

The unit of measurement for magnetic field strength is the Tesla (T).