Capacitance Formula Electrical capacitance is a property of objects that can hold electric charge. A capacitor is an electric component that results from creating a small gap between charge-carrying layers, for example, a parallel-plate capacitor. Mar 29, 2019 · This formula is similar to the formula for inductive reactance, except capacitive reactance is inversely proportional to the frequency. Capacitive reactance X C = 1 / 2πƒC. C is the capacitance of the capacitor, measured in Farads (F). You can measure capacitance using a multimeter and some basic calculations.

Capacitive reactance will decrease if there is an increase in frequency or an increase in capacitance. CAPACITIVE REACTANCE The total reactance of a series AC circuit is determined by the formula X = XL − XC or X = XC − X L. Using the formula f_r_ = 1 / 2 / pi / sqrt (LC) , where f_r_ is frequency at resonance, L is inductance in henries, and C is capacitance in farads, calculate the resonant frequency for a circuit supplied by a 200-volt AC source, a 0.500-microfarad capacitor, and a 0.05-henry inductor in parallel.