Energy is stored within a magnetic field of an inductor.Due to energy conservation, the energy needed to drive the original current should have an escape route. In the case of an inductor, the magnetic field is the escape route of that current. The energy stored in an inductor is equal to the work needed to generate a current through the inductor. The formula for this energy is given as:E =  \\[\\frac {1} {2}\\]   LI2where L is the inductance (unit - Henry) and I (Ampere).