![]() If you look at the equation for calculating the impedance (above), you will notice that it looks like the equation for calculating the hypotenuse of a right triangle. Their sum is always greater than the total voltage V T. The voltages across the resistor V R and the capacitor V C are shown in the diagram at the right angle to each other. The current in both capacitor and resistor is the same because they are connected in series. At 90° a jumper is installed instead of the resistor (the circuit is purely capacitive) and at 0° a jumper is installed instead of the capacitor (the circuit is purely resistive)Ī simple series RC or resistor-capacitor circuit is composed of a resistor and a capacitor connected in series and driven by a voltage source. ![]() ![]() The lead is less than 90° and more than 0°. The phasor diagram for a series RС circuit shows that the total current wave leads the total voltage wave. ![]()
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