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Physical Science Chap. 7 Electricity

Glencoe Physical Science 2005

AB
static electricitythe accumulation of excess electric charge on an object
law of conservation of chargestates that the charge can be transferred from one object to another but cannot be created or destroyed
conductormaterial, such as copper wire, in which electrons can move easily
insulatormaterial in which heat flows slowly
charging by contactprocess of transferring charge between objects by touching or rubbing
charging by inductionprocess of rearranging electrons on a neutral object by bringing a charged object close to it
electric currentthe net movement of electric charges in a single direction, measured in amperes
voltage differencerelated to the force that causes electric charges to flow; measured in volts
circuitclosed conducting loop through which an electric current can flow
resistancetendency for a material to oppose electron flow and change electrical energy into thermal energy and light; measured in ohms
Ohm's Lawstates that the current in a circuit equals the voltage difference divided by the resistance
series circuitcircuit in which electric current has only one path to follow
parallel circuitcircuit in which electric current has more than one path to follow
electrical powerrate at which electrical energy is converted to another form of energy; expressed in watts

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