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Transcript
Magnetism
Ferromagnetic Materials
–Iron, Nickel, and Cobalt
– Magnets have Magnetic Fields.
– Moving electrons produce magnetic fields.
– Earth's Magnetic Field
There is more to it than like poles repel and
opposite poles attract. It has to do with electrical
charge.
Magnetic Domains
Magnetic Tape
Electric Currents and Magnetism.
Oersted’s
discovery
Moving electrons
create a magnetic
field!
solenoid (or inductor)
An
electromagnet
SIM
Magnetic
fields that
move across
a wire create
electricity!
An electric motor converts
electricity to motion.
An electric generator converts
motion to electricity.
Power plants
create electrical
power using
generators called
turbines.
Your Home
Electricity
is not
entirely
efficient.
Sources
• Bloomfield, How Things Work.
• Krauskopf & Beiser, The Physical Universe. 10th ed.
• Tillery, Physical Science.