Pop Quiz Magnetic

What does a magnetic field look like?

• A series of white, dotted lines.

• It's invisible.

• A clear piece of plastic or glass.

• A shimmering area in the air.

How are the magnetic domains of a magnet different

from the domains of an ordinary piece of metal?

• In a magnet, the domains all point in the same direction; in an ordinary piece of metal, they're all jumbled up.

• In a magnet, the domains all point toward the north pole; in an ordinary piece of metal, they all point to the south pole.

• In a magnet, the domains are very strong; in an ordinary piece of metal, they're very weak.

• A magnet contains magnetic domains; an ordinary piece of metal does not

What can you infer about magnetic domains from the fact that they are arrangements of atoms?

• The individual domains are extremely small.

• The individual domains are extremely large.

• The individual domains attract one another.

• The individual domains repel one another.

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Why are the magnetic domains of this paperclip lined up?

• Because the paperclip has acquired a static charge.

• Because a paperclip is a type of electromagnet.

• Because paperclips are permanent magnets.

• Because the paperclip has been exposed to a magnetic field.

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Which of the following metals can be magnetized?

• Lead

• Iron

• Copper

• Silver

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How can you create a magnetic field?

• By stringing many magnets together

• By plugging a refrigerator magnet into an electric socket

• By rubbing a piece of glass against a piece of wool

• By running a current through a wire

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Which of the following statements is true?

• A compass is affected by the earth's magnetic field.

• An object's magnetic field gets weaker as you move closer to it.

• Once a piece of metal becomes magnetized, it stays magnetized.

• The earth's magnetic north pole is located at the geographical north pole

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Where might you find an electromagnet?

• In a fluorescent light bulb

• Hanging on your refrigerator door

• In an electric motor

• In pieces of rock called magnetite

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What can you conclude about electricity and magnetism from the information presented in the movie?

• They have nothing to do with one another.

• They cannot be controlled.

• They are related phenomena

• They have no practical applications

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If you have an electromagnet, how can you make its magnetic field stronger?

• Increase the size of the magnetic domains

• Increase the strength of the electrical current

• Increase the length of the wire

• Increase the distance between the north and south poles

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