Kirchhoff's Voltage Law, Kirchhoff's Current Law, Ohm's Law, Potential Divider Law and Current Divider Law are applicable to circuits with impedances. However, since impedance is a complex quantity (i.e. Z =R +jX), the impedances must be converted into an appropriate form before multiplication and addition.

For the series RLC circuit shown below, the voltage drops across the components can be found by applying Potential Divider Law as follows: