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Rate (how fast) at which charges pass a given point Measured in Amperes or amps Current (I) Electrons moving in a wire make up current and provide energy

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Direct Current (DC) Charges move in one direction Example: batteries Alternating current (AC) Charges continually shift from flowing in one direction to other direction Example: in your home

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A measure of pressure/force applied to electrons to make them move Measure of the strength of current Potential difference between two points in a circuit V (volts) Higher voltage means greater energy More voltage means more current

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Opposition to the flow of electric charge, property that slows the flow of electrons Ω Greek letter Omega Ohms In questions letter R is used Called “electrical friction” means the higher your resistance, the lower the charge or current

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It is a characteristic property of conducting materials Depends on thickness, length, and temperature of material ▪ Good conductors have low resistance and poor conductors have high resistance ▪ As temperature rises, metals’ resistance decreases

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R = V/I V = Voltage (measured in volts V) I = Current (measured in amps A) R = Resistance (measured in Ohms Ω) As resistance increase, current decrease. As resistance decreases, current increases. V RI x

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