IMPEDANCE
Basic AC Reactive Components
Summary
Impedance is summarized below.
Impedance Summary
Impedance (Z) is the total opposition to current flow in an AC circuit.
The formula for impedance in a series AC circuit is:
Z
R2
X2
The formula for impedance in a parallel R-C-L circuit is:
Z
R2
(XC
XL)2
The formulas for finding total current (IT) in a parallel R-C-L circuit are:
where IC > IL , IT
I2R
(IC
IL)2
where IL > IC , IT
I2R
(IL
IC)2
ES-08
Page 18
Rev. 0
