AC Components and Circuits
Impedance in Series RC Circuits
If you know the values for R and XC, you can solve the equation directly. In most practical situations, however, you know the values of C and f, and must calculate XC in order to use the series-Z equation.
Since this is a series circuit, the magnitude of the current is the same at all point. It's the voltage that is subject to phase shifting. Recall there is no phase shift for a resistor (qR = 0º). And for the capacitor the voltage is always lagging the current by 90º ( qC = –90º). It is the phase of the total circuit impedance ( q ) that varies between 0º and –90º.
Endless Examples & Exercises
Voltages in Series RC Circuits
Current in Series RC Circuits
The currents in a series RC are equal, and there are several ways to that value.
Analyzing Series RC Circuits
|David L. Heiserman, Editor||
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Revised: June 06, 2015