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

Series & Parallel circuits

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