Question: At a given instant the current and self-induced emf in an inductor are directed as indicated in Figure. (a) Is the current increasing or decreasing?

At a given instant the current and self-induced emf in an inductor are directed as indicated in Figure.

(a) Is the current increasing or decreasing?

(b) The induced emf is 17 V and the rate of change of the current is 25kA/s; find the inductance.

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