An emf of 0.5 V is developed in the secondary coil, when current in primary coil changes from 5.0 A to 2.0 A in 300 milliseconds. The mutual inductance of two coils would be:

0.02 H 0.03 H 0.01 H 0.05 H

0.05 H

The correct answer is Option (4) → 0.05 H