Magnetism

All magnets have how many poles? (Regions where the magnetic field is the strongest)

• 2

• 1

• 0

What common material is used to visualize the magnetic field?

• Iron filings

• Zinc shavings

• Neodymium shards

Using magnetic field lines, how would one tell where a magnetic field is the strongest?

• The field lines would be very close together

• The field lines would be very far apart

• The field lines would cross one another

How is a magnetic field generated?

• Electrons spin on their own axis and generate a magnetic field

• Electrons pair together to create a magnetic field

• Protons and neutrons interact to generate a magnetic field

What is magnetic domain?

• The combination of magnetic fields in a material

• Material that can be magnetized

• The pairing of electrons in a material

What does it mean for a material to be ferromagnetic?

• It can become magnetized

• It attracts magnets

• It only attracts other ferromagnets

How can a permanent magnet lose its magnetism?

• It can be shocked by hard impacts

• It can be exposed to high temperatures

• It can be brought near an opposite magnetic pole

Does being ferromagnetic necessarily mean a material is a magnet?

• No

• Yes

• It depends

What would happen if you cut a permanent magnet in half?

• Each half would have its own north pole and south pole

• One half would be a south pole and the other would be a north pole

• The "permanent" magnet would lose its magnetism

Where does magnetic force come from?

• From the movement of electrons in the atom

• From charged particles

• From the magnetic field