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Physics - Ch. 22
Electrical circuits
15
Science
12th Grade
03/11/2012

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Term
electric current
Definition
The flow of charged particles.
Term
battery
Definition
A group of several voltaic or galvanic cells connected together to convert chemical energy to electric energy.
Term
photovoltaic cell
Definition
A solar cell that changes light energy into electric energy.
Term
ampere
Definition
The base SI unit of current; one coulomb per second.
Term
resistance
Definition
The ratio of the voltage across a device to the current through it.
Term
resistor
Definition
Device with a specific resistance.
Term
parallel circuit
Definition
A circuit with several current paths, whose total current equals the sum of the currents in its branches.
Term
series circuit
Definition
A circuit in which current passes through each device, one after another.
Term
kilowatt-hour
Definition
Energy unit; the amount of energy equal to 1000 watts delivered continuously for one hour.
Term
equivalent resistance
Definition
In a series circuit, the sum of individual resistances.
Term
fuse
Definition
A short piece of metal that will melt, or blow, if too large a current passes through it and that acts as a safety device by stopping current to the entire circuit.
Term
circuit breaker
Definition
An automatic switch that opens, stopping all current, when the circuit is overloaded.
Term
short circuit
Definition
Low-resistance connection between two points.
Term
ammeter
Definition
A device that measures current.
Term
voltmeter
Definition
A device that measures voltage.
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