Magnets

Which of the following is NOT part of an electromagnet?

• Wire
• Iron
• Toothpick
• Power source

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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.

Which of the following is shown in the picture?

• Electromagnet
• Electric generator
• Electric motor
• Transformer

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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

How are electromagnets different from magnets?

• magnets can be turned on/off
• you can turn an electromagnet on/off
• magnets are more powerful
• magnets have a North and South pole

What happens if you cut a bar magnet in half?

• You get two North pole magnets
• You get two South pole magnets
• You get a North pole magnet and a South pole magnet
• You get two smaller magnets, each with a North and South pole

What is magnetism?

• Energy created by magnets
• A force created by magnets
• A contact force
• An invisible force that attracts electrically charged particles

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What are the ends of a magnet called?

• East and west poles
• Left and Right ends
• North and South ends
• North and South poles

What is the name of the force that attracts or repels materials?

• current
• electricity
• magnetism

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Surrounding every magnet is a __________  __________.

• magnetic field
• electrical current
• another magnet

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