Energy stored 

in a coil due to 

Self-inductance

 

1) As we see the generated emf is


       

This negative -ve emf means opposite to the direction of applied emf. So work has to be done against this potential.



Now we know that



Then putting the value of  e




therefore work done when current increases from  I = 0 to  I = I







which is the energy stored in a coil due to self inductance.