Parallel Circuit (2)

Validation • Total Resistance (1/Rtotal) = (1/R1) + (1/R2) + (1/R3) = 1/100 + 1/220 + 1/330 = 0.01757ohms • So, Rtotal = 1/0.01757 = 56.915 ohms • Current, Itotal=V/Rtotal = 12/56.915 = 0.210841 A = 210.84 mA • Current at R1, IR1 = V / R1 = 12 / 100 = 0.12A = 120 mA • Current at R2, IR2 = V / R2 = 12 / 220 = 0.05454A = 54.545 mA • Current at R3, IR3 = V / R3 = 12 / 330 = 0.03636A = 36.364 mA • Now, IR1 + IR2 + IR3 = 120 + 54.545 + 36.364 = 210.91 mA = Itotal