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Electricity

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Electric Current The net movement of electric charges in a single direction Electrons in a material (metal wire) are in constant motion in all directions = No Net Movement of electrons in one direction In an electric current the electrons drift in the direction of the flow

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Electric Current Measured in Amperes 1 Ampere = 6,250 million electrons flowing past a point every second

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Voltage Difference Electric Charge flows from higher voltage to lower voltage Measured in Volts

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Resistance The tendency for a material to oppose the flow of electrons Changes electrical energy into thermal energy or light Measured in Ohms (Ω)

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Ohm’s Law I Current (amperes) V Voltage Difference (volts) R Resistance (ohms) (89-90)

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