The inductance of the self is the ration between the induced electromotive force (EMF) through a coil at the rate of change of current through this coil. Self inductance is a term related to the phenomenon of self induction. Self induction induces self-induction. The self-induction or coefficient of Self-induction is called L. Its unit is Henry (H). First we have to know what self-induction is. Self induction is the phenomenon whereby in a coil a change in the electric current produces an induced electromagnetic force through this coil itself. This induced Electro Motive Force (ε) through this coil is proportional to the current rate of change. The higher the rate of change in the current, the greater the value of the EMF.