Description

X_L = Capacitive Reactance in Ohms
π = 3.142... decimal or 22/7 fraction
f = Frequency in Hertz (Hz)
h = Inductance in Henrys (H)

Overview

Reactance

Reactance $\scriptstyle X$ is the imaginary part of the impedance; a component with a finite reactance induces a phase shift $\scriptstyle \theta$ between the voltage across it and the current through it.

$\ X = |Z| \sin{\theta} \quad$

A purely reactive component is distinguished by the sinusoidal voltage across the component being in quadrature with the sinusoidal current through the component. This implies that the component alternately absorbs energy from the circuit and then returns energy to the circuit. A pure reactance will not dissipate any power.

Inductive reactance

Inductive reactance $\scriptstyle{X_L}$ is proportional to the signal frequency $\scriptstyle{f}$ and the inductance $\scriptstyle{L}$ .

$X_L = \omega L = 2\pi f L\quad$

An inductor consists of a coiled conductor. Faraday's law of electromagnetic induction gives the back emf $\scriptstyle{\mathcal{E}}$ (voltage opposing current) due to a rate-of-change of magnetic flux density $\scriptstyle{B}$ through a current loop.

References

This description was obtained from wikipedia.