AC Circuit Equations

Chapter 1 - Useful Equations And Conversion Factors

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Inductive Reactance

 

 

Capacitive Reactance

 

 

Impedance in relation to R and X

ZL = R + jXL

ZC = R - jXC

 

Ohm’s Law for AC

 

 

Series and Parallel Impedances

 

 

NOTE: All impedances must be calculated in complex number form for these equations to work.

 

Resonance

 

 

NOTE: This equation applies to a non-resistive LC circuit. In circuits containing resistance as well as inductance and capacitance, this equation applies only to series configurations and to parallel configurations where R is very small.

 

AC Power

 

 

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