
Inductive Reactance
Inductive reactance is the opposition to AC
current flow that is caused by the presence of an inductor in the circuit. 

 The symbol for inductive reactance is X_{L}.
 The units of measure for inductive reactance is ohms, W.

The amount of inductive reactance in a circuit is proportional to:
 Applied frequency, f
 Value of the inductor, L
Inductive reactance is an AC
version of resistance. In fact, you can use Ohm's Law by substituding X_{L}
for R:
V_{L} = I_{L}X_{L}
where:
V_{L} is the voltage across the inductor in volts
I_{L }is the current through the inductor in amperes
X_{L} is the amount of inductive reactance in ohms
