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# The current and voltage in a circuit is given by:

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#### The Voltage, V(in volts), across a circuit is given by Ohm's law: V=IR Where I is the current (in amps) flowing through the circuit and R is the resistance (in Ohms). If we place two circuits, with resistance R1andR2, in parallel, then their combined Resistance, R, is given by 1R=1R1+1R2

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