Alternating Current

RCL Series Circuits

The current I through this RCL series circuit is related to the voltage V by

V = I Z

where Z is the total impedance of the circuit. As with XC and XL, the impedance Z will depend upon the frequency of the AC voltage. The total impedance Z is given by

Remember, of course, that the reactances XL and XC depend upon the frequency.

Inductive Reactance

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(c) Doug Davis, 2002; all rights reserved