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Science - chp 21

science - chp 21

WordDefinition
static electricity the net build up of electric charges on an object
electric field an area surrounding an electron that exerts a force on anything nearby with an electric charge
conductor a material that allows electrons to move easily through it
insulator a material that does not allow heat or electricity to move through it easily
electroscope a device containing two suspended metal leaves in a jar tht move apart when charged
potential difference the difference in electric potential energy between two different points
circuit a closed path through which electrons flow
current the flow of electrons through a wire or any conductor
dry cell a power source that acts as an electron pump and generates electric current by a chemical reaction
wet cell a power source that generates electric current by a chemical reaction; liquid electrode
resistance the opposition to the flow of electrons through a conductor; measured in ohms
Ohm's Law states that potential difference = current X resistance
series circuit An electrical circuit where the current has only one path
parallel circuit an electrical circuit where the current flows through more than one path
electrical power the rate at which electrical energy is converted to another form of energy
kilowatt-hour the unit of electrical energy; 1 kilowatt hour = 1000 watts
Created by: Christina Watson
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