Magnets
Any object that attracts the metal iron.
What is a magnet?
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An invisible field that surrounds all magnets.
What is a magnetic field?
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A magnet created by wrapping a current-carrying wire around a ferromagnetic core.
What is an electromagnet?
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A device that uses a magnetic field to transform mechanical energy to electric energy.
What is an electric generator?
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A device that uses an electric current to produce motion.
What is an electric motor?
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These three devices that all contain magnets.
What is a hair dryer, a computer, and a stereo system?
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Lines that represent a magnet's magnetic field.
What are magnetic field lines?
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The core of an electromagnet is made by placing a _____________ ________ within a wire coil.
What is ferromagnetic material?
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The current produced by a generator.
What is alternating current?
A coil of wire connected to a rotating shaft, a permanent magnet, and a source of electric energy.
What are the main parts of an electric motor?
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Larger generators often use powerful ______________ to produce a magnetic field.
What are electromagnets?
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Magnets you might be familiar with.
What are bar and horse shoe magnets?
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