() () ()

Equation 10.11 is the analog of Ohm’s law for the RC circuit. The “resistance” of the circuit is called the impedance Z and is given by

1 Z R

Cω  

= +    (10.12)

Pictorially, the relationships expressed by Eqs. 10.11 and 10.12 are shown in Figure 10.3. The quantity ω=cR C1/ is called the capacitive resistance. The impedance Z, as well as R and Rc , are measured in ohms.