ELECTROMAGNETISM PREP

What is created when a magnet moves through a coil of wire?

• A. an electromagnet
• B. a ferromagnet
• C. a solenoid
• D. an electric current

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What kind of magnet can be turned on and off?

• refrigerator magnet
• electromagnet
• magnetite
• iron

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If you wrap more coils around an electromagnet, it will become 

• brighter
• stronger
• weaker
• invisible

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The picture is an example of an:

• Electric circuit
• Electromagnet
• Electric nail
• Electric power cell

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To make this electromagnet stronger you could:

• use less wire

• have fewer wire coils around the nail

• have more wire coils around the nail

• use a plastic core

What is true about electricity and magnetic fields?

• Electricity is needed to create any magnet.
• Electricity always creates a magnetic field.
• Electricity is stronger than a magnetic field.
• Electricity prevents magnetic fields from occurring.

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When running a current through a wire, what do the blue lines represent?

• The wire spinning

• A magnetic field that was created

• Electrons leaving

• Electricity

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Electric current flowing through a wire produces

• static electricity
• an open circuit
• a permanent magnet
• a magnetic field

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What type of core is best for electromagnets?

• Steel

• Iron

• Plastic

• Copper

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How can a magnet be used to produce an electric current?

• Hold a magnet next to a piece of wire.

• Wrap wire around a magnet.

• Spin the magnet around inside a coil of wire.