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20.2 Chemistry

Vocabulary Words

QuestionAnswer
electric current a continuous flow of electric charge
direct current (DC) a flow of electric charge in only one direction
alternating current (AC) a flow of electric charge that regularly reverses its direction
electrical conductor a material through which electric charge can flow easily
electrical insulator a material through which charge cannot flow easily
resistance the opposition to the flow of electric charges in a material
superconductor a material that has almost zero resistance when it is cooled to low temperatures
potential difference voltage, or the difference in electrical potential energy between two places in an electric field
voltage potential difference, the difference in electrical potential energy between two places in an electric field
battery a device that converts chemical energy into electrical energy
Ohm's law the relationship of voltage, current, and resistance: V=IR
Created by: MarieElyn