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Physical Science Ch15 Test

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Across
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Converts electrical impulses into sound waves
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Rate of charge flow
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Converts electricity to back-and-forth motion
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Does not allow easy flow of electric current
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Ohm is the SI unit of ____
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A circuit with a gap that does not allow electrons to cross
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Automatic switch that opens a circuit when current exceeds predetermined amount
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A parallel arrangement increases ____
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4 factors affecting resistance: type of material, length of object, _____ of object, & temp
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Amount that an object hinders electron flow
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The SI unit used to measure the "force" with which an electric current flows
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Group of electromagnetic cells connected as a single source of electricity
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Uses electromagnets to communicate across long distances
Down
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A series arrangement increases ____
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Light-emitting diode
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Materials that allow electrical current to pass through with NO resistance
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Ampere is the SI unit of ____ flow
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Electric discharge lamp produces light by passing an electric current through a long tube filled with mercy vapor
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Generator that uses fluid as a moving conductor
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The "force" with which an electric current flows
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Produced by electron friction
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Voltage and current are ____ proportional
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An incandescent lamp produces light by heating a ____
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Electrical switch operated by an electromagnet
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Filed magnet, armature, slip ring are all part of which generator
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Uses electromagnetic induction to increase or decrease the voltage of AC
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Uses electromagnetic induction to produce electric current
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Semiconductor that emits light when a direct electric current is applied
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A device designed to open or close a circuit
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Houses a small metal strip that breaks to stop excessive current
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AC flow in ____ directions