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Simple Electric Circuit Magnetism and the Electromagnet
Mechanical Systems (revision)Developed by: Johnny Freese
WCED: METRO SOUTH
CAPS Technology Grade 7Term 3
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TYPES OF MAGNETS
HORSE SHOE
BAR MAGNET
MANY TYPES
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MAGNETISED & UNMAGNETISED
UNCOMBED HAIR
COMBED HAIR
UNMAGNETISED MAGNETISED
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Some metals are attracted to magnets and some are not.
iron
aluminium
nickelsteel
wood
copper plastic
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A simple electrical circuit
3 volt battery switch
Light bulbConducting wire
1,5 V 1,5 V
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Simple circuit diagram
1,5 volt cell
Conducting wire
switch
Light bulb
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SummaryComponent Name Component Picture Symbol
Cell
Switch
Light Bulb
Conducting wires
1,5 V
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Simple electromagnet
N SIron nail
Cell
SwitchInsulated copper wire
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Magnetic force!
More windings mean a stronger magnet
3 layers of windings
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Explain how this electromagnet machine works. Many technologies use electromagnets.