AC Impedance of a Resistor-Capacitor Circuit

In a parallel resistor-capacitor (RC) circuit (R/C), the overall AC impedance of the circuit is denoted as ZR/C. Since 

Ultimately, Equation 2.73 can be transferred to the standard form of a complex number  

Therefore, the real and imaginary components, Zre and Zim, in the AC impedance of the parallel RC circuit are given by 

In a series RC circuit (R-C), according to the primary rules, the overall impedance, ZR C, is expressed as 

---