An inductor of 5 H self-inductance carries a steady current of 2 A. How can a self-induced emf of value 50 V be made to appear across the inductor?
1
If the current of 2 A is interrupted within 0.2 sec
2
If the current of 4 A is interrupted within 0.2 sec
3
If the current of 4 A is interrupted within 0.1 sec
4
If the current of 2 A is interrupted within 0.4 sec