Impedance
Impedance (Z) is the measure of opposition that a circuit presents to the passage of alternating current (AC) and is expressed in ohms (Ω). It is a complex quantity, comprising both real (resistance) and imaginary (reactance) components.
Z = R+j(XL−XC)
where:
- R is the resistance,
- XL is the inductive reactance,
- XC is the capacitive reactance,
- j is the imaginary unit.
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