The current flowig through an inductor drops from 10A to 2A in 2m sec. If the self inductance of the coil is 10mH, find the emf induced across the ends of the inductor.

The current through a 1mH inductor changes from 5 ampere to 10 ampere in 1 millisecond. Find the emf induced.

The current in a coil of self inductance 1 mH changes from zero to 10 Ampere in a time interval of 10 millisecond. Find the emf induced across the coil and the energy stored during that time.