<^< Worksheet: Inductive Reactance | Course Index | Worksheet: Impedance >^>
Circuits that contain a mixture of both resistance and reactance are said to exhibit impedance.
Impedance, like resistance and reactance, is simply the ratio of applied voltage to the current flowing. Thus:
Z = V/I
where Z is the impedance in ohms (Ω), V is the alternating potential difference in volts (V) and I is the alternating current in amps (A).
The impedance of a series circuit (R in series with X) is given by:
Z = √(X2 + R2)
where Z is the impedance (in Ω), X is the reactance, either capacitive or inductive (expressed in Ω), and R is the resistance (in Ω).
<^< Worksheet: Inductive Reactance | Course index | Worksheet: Impedance >^>
