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How is impedance calculated in a circuit?


1 Answer

Impedance in a circuit can be calculated using Ohm's Law. For a purely resistive circuit, impedance is equal to resistance. However, in circuits with inductive or capacitive elements, the impedance is a complex value. The magnitude of impedance can be calculated using the formula:

|Z| = √(R^2 + (Xl - Xc)^2)

Where R is the resistance, Xl is the inductive reactance, and Xc is the capacitive reactance. The phase angle of the impedance can be determined using the tangent of the phase shift between voltage and current.
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