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ch 34 vocab
physics 34 vocab
| Question | Answer |
|---|---|
| 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
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