Magnetism&Electromagnetism - TCI Forces&En Lesson 6

_______ magnets have a North pole and a South pole.

• No
• Some
• All
• Broken

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The relationship between electricity and magnetism is called

• electrical energy.
• induced current.
• electromagnetism.
• ferromagnetism.

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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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Surrounding every magnet is a(n) __________  __________.

• magnetic field
• electrical current
• smaller magnet
• funny saying

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What kind of magnet can be turned on and off?

• a refrigerator magnet
• an electromagnet
• magnetite
• iron

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When magnetic field lines are drawn, how do they look?

• straight lines
• criss-crossed lines like X's
• curved lines from N to S pole and outwards
• lines extending outward in all directions like drawing the Sun

Which will make an electromagnet WEAKER?

• more coils of wire around nail
• an extra battery attached
• thicker wire
• remove one of the nails from the coils

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What happens to the strength of a magnetic field as you move away from the magnet?

• The strength of the magnetic field increases.

• The strength of the magnetic field doesn't change.

• The strength of the magnetic field is doubled.

• The strength of the magnetic field decreases.

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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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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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