# Inductance

### Explanation of question 7

An inductor is suddenly connected across a DC supply. The current will be represented by

The answer is :- 2 The current does not immediately rise to its final value, but increases comparatively slowly. As the magnetic field forms, so a "back emf" will be generated. This will cause an opposing current to flow inside the conductor. Thus the final value of the current flowing through the inductor will be slightly less than the maximum.

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