Magnetism and Electric Currents Quiz

What is a magnetic field?

Where on a magnet is the force of attraction the strongest?

How do the poles of magnets interact?

• North and South: attract each other

• North and North: repel each other

• South and South: repel each other

How can you increase the attractive force between two permanent magnets?

• Use stronger magnets

• Reduce the gap

• Align the poles correctly

• Use a magnetic circuit

• Lower the temperature

How can you decrease the attractive force between two permanent magnets?

• Increase the gap

• Misalign the poles

• Insert a non-magnetic barrier

• Heat the magnets

• Partially demagnetize them

What materials can be magnetized?

• iron

• nickel

• cobalt

• some alloys

How can you make a temporary magnet using just a nail and a permanent magnet?

What is the magnetic domain? How can you change the magnetic domain of a substance?

How do charged particles interact?

• Negative and Positive: Attract each other

• Negative and Negative: repel each other

• Positive and Positive: Repel each other

What are two ways you can increase the attractive forces between charged particles?

• Increasing charge magnitude

• Decreasing distance