When the current changes from $+2$ A to $-2$ A in 0.05 second, an e.m.f. of 8 V is induced in a coil. The coefficient of self-induction of the coil is (1) 0.2 H (2) 0.4 H (3) 0.8 H (4) 0.1 H
When the current changes from $+2$ A to $-2$ A in 0.05 second, an e.m.f. of 8 V is induced in a coil. The coefficient of self-induction of the coil is\\
(1) 0.2 H\\
(2) 0.4 H\\
(3) 0.8 H\\
(4) 0.1 H