The
impedance Z of a circuit is the ratio of the phasor voltage
V to the phasor current
I, measured in ohms.
In some ways, you could say that the impedance acts the same as the resistance in a circuit, but not completely.
The
admittance Y is the reciprocal of impedance, measured in siemens.
Resistors,
capacitors, and
inductors are the three elements that cause
impedance. Though you have to convert the capacitance C and the
inductance L to get their equivalent impedances Z, by applying these
formulas:
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