In a capacitive circuit, as in an inductive circuit, impedance is the resultant of phasor addition of R and XC.
The below Equation is the mathematical representation for impedance in an R-C circuit.
A 50 Ω XC and a 60 Ω resistance are in series across a 110V source (Figure 7). Calculate the impedance.
Figure 7 : Simple R-C Circuit
Z = √ (602 + 502)
Z = √6100
Z = 78.1 Ω