When the current changes from +2A to -2A in 0.05 s, an emf of 8 V is induced in a coil. The coefficient of self-induction of the coil is
A. 0.2 H
B. 0.4 H
C. 0.8 H
D. 0.1 H
Answer:D
When the current changes from +2A to -2A in 0.05 s, an emf of 8 V is induced in a coil. The coefficient of self-induction of the coil is
A. 0.2 H B. 0.4 H C. 0.8 H D. 0.1 H