Some of important characteristics of a inductor are now apparent: 1. There is no voltage across an inductor if the current through it is not changing with time, An inductance is therefore a short circuit to dc 2. A finite amount of energy can be stored in an inductor even if the voltage across the inductance is zero such as when the current through it is constantSome of important characteristics of a inductor are now apparent: 1. There is no voltage across an inductor if the current through it is not changing with time, An inductance is therefore a short circuit to dc. 2. A finite amount of energy can be stored in an inductor even if the voltage across the inductance is zero such as when the current through it is constant