Magnetism & Electromagnets

What do the lines around this magnet represent?

• North Pole
• South Pole
• Magnetic Declination
• Magnetic Field

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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

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What can cause a magnet to lose its magnetism?

• Exposing to light

• Heating

• All of the above

• Dropping

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What device is made of coils of wire with an electrical current passing through it in order to generate a magnetic field?  

• Electromagnet 

• Generator

• Electron Magnet 

• Magneto's Helmet

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Electric motors are devices that convert ​ (a)   energy into  ​ (b)   energy. ​

• electrical
• mechanical
• gravitational
• solar

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What two forces are required for generators and electric motors to work?

• magnetism and thermal

• electricity and thermal

• electricity and magnetism

• magnetism and radiant

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Which of the following materials would make good conductors of electrical current?

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