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ch 34 vocab

physics 34 vocab

QuestionAnswer
potential difference the difference in electric potential between two points. free charges flow.
electric current the flow of electric charge, measured in amperes.
ampere si unit of electric current. symbol A.
voltage source a device, such as a battery or generator, that provides a potential difference
electric resistance the resistance of a material to the flow electric current through without resistance
superconductivity a property of a material that has infinate conductivity at low temperatures. so charge flows through without resistance.
ohm the si unnit of electric resistance
ohms law the statement that the current in a circuit is directly proportional to the voltage impressed across the circuit and is inversely proportional to the resistance of the circuit
direct current electric current whose flow of charge is in one direction
alternating current electric current that repeatedly reverses direction, twice each cycle, 60 cycles per second.
diode an electronic device that restricts current to flow in a single direction in an electric circuit
electric power the rate at which electrical energy is converted into to another form such as light, heat, and mechanical energy.
Created by: Wardlaw