# Energy Stored in the Magnetic Field Associated With a Current-Carrying Inductor

## Energy Stored in an Inductor

The energy stored in the magnetic field of an inductor (links to http://www.mw0llo.com/inductors.aspx) that is passing a steady electric current is given by:

MathML formulaFormula ImageStraight text formula
$E = 0.5 L I 2$ E = 0.5 LI2

Where:

E = energy, Joules

L = inductance, Henrys

I = current, Amps

Energy, E =