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Unit D Electrical
Definitions that I am unsure of
| Question | Answer |
|---|---|
| potential difference | change in the potential energy of electric charge compared to its potential energy at a reference point, such as the ground; voltage |
| dry cells | cell that has its electrolyte in the form of a paste, usually in a sealed case; the type of cell commonly used in portable devices such as flashlights |
| electrolysis | decomposition of a substance by an electric current |
| rheostat | continuously variable resistor used to regulate electric current |
| Ohm's Law | law stating that, as long as the temperature remains constant, the resistance of a conductor remains constant, and the current is directly proportional to the voltage applied;R = V/I or I = V/R or V = IR |
| galvanometers | device for detecting and measuring small electric currents |
| photoconductors | a resistor that becomes more conductive when exposed to light |
| transformer | device that changes electricity at one voltage into electricity at a different voltage; a step-up transformer increases the voltage; a stepdown transformer decreases the voltage |
Created by:
brookemckenzie
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