Review: Magnetism + Electromagnetism

Magnetism is generated by moving

• protons.
• electrons.
• neutrons.
• elements.

What do the lines around this magnet represent?

• North Pole
• South Pole
• Magnetic Declination
• Magnetic Field

As the distance between two magnets increases (they get farther apart), the force between them:

• Increases
• Decreases
• Stays the Same

If the North Pole of a permanent magnet is placed next to a compass as seen in the picture, which direction will the needle move?

• Clockwise

• Counter-clockwise

• It will not move

• Need more information

An electromagnet's poles may be reversed by:

• decreasing the voltage of the coil
• increasing the number of coils
• changing the direction of current flow
• altering the material used to make the coils

In un-magnetized materials the domains are __________ aligned.

• super
• slightly
• randomly
• always

What kind of magnet can be turned on and off?

• refridgerator magnet
• electromagnet
• magnetite
• iron

If a glass plate is placed over a magnet and iron filings are sprinkled over the glass, a pattern will be visible. What does this pattern indicate?

• The magnetic field

• The electrostatic field

• The piezoelectric effect

• The chemical reaction of the magnet and the filings

What causes magnetism?

• the sun

• moving neutrons

• moving charges

• friction

How can a wire become magnetic?

• point it north

• add a resistor

• heat it up

• run a current through it