Ohm's Law is used to solve circuit problems which may contain all three elements: resistors, inductors, and capacitors. These circuits are sometimes called R LC circuits using the symbol R for resistance, L for inductance and C for capacitance. The general form of Ohm's Law applied to R LC circuits states:

Voltage = Current x Total Impedance, or V = A times R where;

A = current in amps R = total impedance in ohms

Total impedance is the result of combining the impedances of the resistance and inductive and capacitive reactance components of the circuit. This is not done by simple addition.

EXAMPLE Series R LC AC Circuit

Determine the total impedance and current flow for the circuit shown.

Obtaining the total impedance through vector addition and power factor from the angle between total impedance and resistance:

Determine the current flow.

the power factor of the circuit can also be found by dividing the resistive component by the reactive component in the circuit.