click below
click below
Normal Size Small Size show me how
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 |