Electromagnetism

What happens if you cut a magnet in half?

• Nothing

• The magnets repel

• There will be two magnets

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Which is not a way to strengthen an electromagnet?

• Use a stronger power source

• Use a plastic wire

• Use a stronger magnetic material

• Wrap the wire around the magnetic material more times.

True or false: All objects made of iron, nickel, and cobalt are magnetic

• True

• False

The picture above is an example of what?

• Magnetic field

• Electric field

• Repulsion

• Attraction

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What would happen with the magnets in the picture above?

• They would repel

• Nothing

• They would attract

• They would repel and then attract

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How do you make an electromagnet stronger?

• Add a motor and/or lightbulbs
• Add more light bulbs and/or wire coils
• add more wire coils and/or a switch
• add more wire coils and/or batteries

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This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.
• Use a smaller battery.
• Reverse the poles of the magnet.
• Remove all the coils and the nail.

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What happens when an electric current flows through a wire?

• The wire begins to spin.

• Nothing happens.

• A field of gravity is created around the wire.

• A magnetic field is created around the wire.

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What does this image show?

• Parallel circuit

• Series circuit

• Magnet

• Electromagnet

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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.

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