Remains constant in a series circuit, Current, Remains constant in a parallel circuit, Voltage, Voltage, Current is proportional to, Current is inversely proportional to, Resistance, Formula for series total resistance , Rt = R1 + R2 + R3 etc, Formula for parallel total resistance, 1/Rt = 1/R1 + 1/R2 + 1/R3 etc, Supply voltage is found by, Vs = V1 + V2 + V3 etc, Supply current is found by, Is = I1 + I2 + I3 etc, Current is , A flow of electrons, Voltage is , Force or pressure that pushes electrons around a circuit, Resistance is, The opposition to current flow, Formula symbol used for current is , I, Unit of measurement for resistance is, Ohm, Unit of measurement for current is , Ampere, Total resistance in a parallel circuit is, Found by adding the reciprocals together, Kirchoffs voltage law for series circuits, Individual voltages added together equals the supply voltage, Kirchoffs current law for parallel circuits, Individual currents added together equals the supply current, Using Ohms law V = , I x R, Using Ohms law I = , V/R, Using Ohms law R = , V/I.

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