Ch5-Magnetism and Matter

If you place the North pole of a magnet next to the South pole of another magnet, they will:

• Attract
• Repel
• Do nothing
• Shatter

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Magnetism is generated by moving

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

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If you cut a magnet in half, what happens to the poles?

• One half gets the North Pole, the other half gets the South Pole
• Both halves get only a North Pole
• Both halves get only a South Pole
• Both halves get a North pole and a South Pole

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

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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

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Surrounding every magnet is a __________  __________.

• magnetic field
• electrical current
• another magnet

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How many poles does a magnet have?

• 1
• 2
• 3
• 4

The strongest point on a magnet is located

• In the magnetic field
• Center of the magnet
• At the Poles (close)
• At the Poles (further away) 

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2 ways to increase the magnetic force of an electro-magnet

• Increase the current flow, reduce the number of coils
• Increase the voltage, decrease the number of coils
• Increase the number of coils and the current flow
• Spread out the coils, replace iron core with rubber.

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The SI unit of magnetic field is 

• weber
• guass
• tesla
• farad

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