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### 20 Cards in this Set

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• Back
 electric field an area surrounding an electron that exerts a force on anything near by. conductor a material that allows electrons to move easily through it. insulator a material that doesnt allow electrons to move through it easily. electroscope made of two thin metal leaves attached to a metal rod with a knob at the top. current the flow of electrons through a wire or any conductor circuit a closed path through which electrons can flow. dry cell can act as a nelectron pump because it has potential difference between the positive and negative terminals. electrical power the rate at whcih electrical energy is converted to another form of energy. ampere SI unit of electrical current. watt SI unit for power. Ohm SI unit of electrical resistance. Wet Cell Contains two connected plates made of different metals or metallic compounds in an electrolyte solution. Volt SI unit for potential difference. Static Electricity The net accumulation of electric charges on an object. Series Circuit The current has only one path it can travel along. Resistance The tendency for a material to oppose the flow of electrons, changing electrical energy into thermal energy. Potential Difference The difference in potential between two different places, and is measured in volts. Parallel Circuits Contain separate branches of current to move through. Ohms Law States that potential difference equals current times resistance. Kilowatt-Hour Unit of electrical energy.