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Ferromagnetic MaterialsIron, Nickel, and Cobalt

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Magnets

– Magnets have Magnetic Fields.

– Moving electrons produce magnetic fields.

– Earth's Magnetic Field

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Magnets cont.

• There is more to it than like poles repel and opposite poles attract. It has to do with electrical charge.

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Magnetic Domains

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Magnetic Tape

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Oersted’s discovery

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Moving electrons create a magnetic field!

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X

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solenoid (or inductor)

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An electromagnet

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Magnetic fields that move across a wire create electricity!

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An electric motor converts electricity to motion.

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An electric generator converts motion to electricity.

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Power plants create electrical power using generators called turbines.

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Your Home

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Electricity is not entirely efficient.

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Sources

• Bloomfield, How Things Work.

• Krauskopf & Beiser, The Physical Universe. 10th ed.

• Tillery, Physical Science.