IMPEDANCE Basic AC Reactive ComponentswhereZ = impedance (W)R = resistance (W)X = net reactance (W)The relationship between resistance, reactance, and impedance is shown in Figure 5.Figure 5 Relationship Between Resistance, Reactance, and ImpedanceThe current through a certain resistance is always in phase with the applied voltage. Resistanceis shown on the zero axis. The current through an inductor lags applied voltage by 90°; inductivereactance is shown along the 90° axis. Current through a capacitor leads applied voltage by 90°;capacitive reactance is shown along the -90° axis. Net reactance in an AC circuit is thedifference between inductive and capacitive reactance. Equation (8-7) is the mathematicalrepresentation for the calculation of net reactance when X_{L} is greater than X_{C}.X = X_{L} - X_{C}(8-7)whereX = net reactance (W)X_{L} = inductive reactance (W)X_{C} = capacitive reactance (W)ES-08 Page 10 Rev. 0

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