Unit 2 Lesson 4- What Can Magnetic Forces Do?

What will happen if you bring the north pole of one magnet near the south pole of another magnet?

• The magnets will lose their magnetic force

• The magnets will push apart

• The magnets will pull together

Where are magnetic forces strongest on a bar magnet?

• Near the poles of a magnet

• in the middle of a magnet

• everywhere

An electromagnet is a magnet that

• Has only one pole

• can be turned on and off

• produces electricity

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Engineers use magnets to design useful devices. Which of these devices uses magnets?

• a lamp

• a wheelbarrow

• a doorbell

Anthony has two magnets with labels marking the north and south poles. He puts both magnets on the table. The "S" on one magnet it pointed toward the "N" of the other. What can Anthony expect to happen?

• The magnets will push apart

• The magnets will pull together

• The magnets will become stronger

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What is magnetic force?

• A force between electric charges

• A push and pull between magnets

• A measurable change in position

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Which of the following is true about magnets?

• all magnets can be turned on and off

• all magnets always pull but never push

• all magnets have a north and south pole

Which of the following statements about magnets is true?

• Like poles repel

• unlike poles repel

• force is weakest at the poles

_____ have the strongest attractive magnetic force

• unlike poles that are far apart

• Like poles that are far apart

• Unlike poles that are close together

A maglev train is able to float above its tracks because______

• like poles repel each other

• like poles attract each other

• unlike poles repel each other

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