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Capacitive and Inductive Impedance

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AbhinavRajan

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In a circuit with Capacitance and Inductance with an AC source, I see that when we calculate the value for the impedance of the capacitor and Inductor

there is a complex component "j".




What is the complex term and why is the complex term "j" included in the expression ?
 

Using the j operator simplifies the mathematics when analysing circuits with Rs, Cs and Ls. It labels components so they are known to have currents and voltages at 90 degrees to each other and the + or- signify whether the current is leading or lagging.
Frank
 
It comes from mathematical demonstration and that impedance and "j" only applies in sinusoidal steady state.
 
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