Electrical and Magnetic Forces

Where on a magnet is the magnetic force the strongest?

• at the poles

• in the middle

• above the magnet

• below the magnet

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Drag the terms to the correct area on the image:

a

b

c

d

Wire

Iron Core

Magnetic Field

Battery

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What do the lines around this magnet represent?

• North Pole

• South Pole

• Magnetic Declination

• Magnetic Field

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

• Increases

• Decreases

• Stays the Same

• Switches to the "Dark Side"

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What will happen when these magnets are brought close together?

• They will attract each other.

• They will repel each other.

• Both magnets will turn to the left

• Both magnets will turn to the right

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After being magnetized, a ​ (a)   magnet will retain the properties of magnetism ​ (b)   . A temporary magnet is a magnet made of soft iron, that is usually easy to ​ (c)   ; however, temporary magnets lose most of their magnetic​ (d)   when the magnetizing cause is ​ (e)   .

• permanent

• indefinitely

• magnetize

• properties

• discontinued

• electricity

• gravity

What can cause a magnet to lose its magnetism?

• Exposing to light

• Heating

• All of the above

• Dropping

A junkyard needs a magnet to separate iron and nickel scraps from other items. The scraps will be placed in a container for recycling. A manager is deciding whether to purchase an electromagnet or a bar magnet. Which is the BEST reason to choose an electromagnet or a bar magnet?

• An electromagnet because it attracts iron and nickel

• A bar magnet because it is a permanent magnet

• A bar magnet because it is stronger than an electromagnet

• An electromagnet because it can be turned on and off

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The force of magnetism is stronger when magnets are ________________

• cold

• round

• closer together

• farther apart

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