Complex Impedance - Current in AC Circuit Equations

Electronics, Instrumentation & Electrical Database

The following table gives Complex Impedance and Current in AC Circuit Equations.

Where it is required to add or subtract impedances the cartesian form is more convenient, but when quantities are multiplied or divided the calculation becomes simpler if the polar form is used. A circuit calculation, such as finding the total impedance of two impedances in parallel, may require conversion between forms several times during the calculation. Conversion between the forms follows the normal conversion rules of complex numbers .

In Cartesian
form
Cartesian
In polar form polar form
Modulus