Magnets Review

How are electromagnets different from magnets?

• magnets can be turned on/off

• you can turn an electromagnet on/off

• magnets are more powerful

• magnets have a North and South pole

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The strength of a magnet can be changed by

• adding less loops to the coil.

• adding more loops to the coil.

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A north pole and a south pole will attract each other.

• True

• False

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

• At the poles.

• In the middle of the magnet.

• Above the magnet.

• Below the magnet.

What will happen when these magnets are brought close together?

• They will attract each other.

• They will repel each other.

• Both the magnets will turn to the left.

• Both the magnets will turn to the right.

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Iron, Nickel and Cobalt are all __________________ materials.

• Shiny

• Poles

• Magnetic

• Cold

You know this substance is magnetized because

• all the domains have right angles

• the arrows are drawn in red

• the domains are aligned

• the domains are random

_______________________ is the invisible force that flows through a magnet.  

• repel

• copper

• attraction

• magnetism

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Which type of magnet does not lose it's magnetic properties easily.

• a permanent magnet

• an electromagnet

• a temporary magnet

• a nail rubbed across the north pole of a magnet

Which of the following objects cannot be moved by a magnet?

• A paper clip

• A nail

• A toothpick

• A staple

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