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P4 (Transformers (Increase/decrease p.d., Induces p.d. by cutting field…
P4
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Magnetism
Magnets
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Induced magnet - has regions that are not lined up, but do line up in a magnetic field
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Mics/speakers
Microphone
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P.d. is induced, produces electrical signal
Carbon microphone - carbon granules behind diaphragm change resistance, changing the current
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