# AC Circuit Equations

#### Chapter 1 - Useful Equations And Conversion Factors

### Inductive reactance

### Capacitive reactance

### Impedance in relation to R and X

Z

_{L}= R + jX_{L}

Z

_{C}= R - jX_{C}

### 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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