Answer Posted / shivkant sharma

First you should notice in which DC application you are
using inductor. Generally in two cases of DC, we use inductor
1. As Filter
2. In case of power supplies

In case of FILTER application we are getting rippled DC so
to Smooth that DC we use inductor, that opposes change in
current.

And in case of DC to DC converters(Power Supply
Applications) we use inductor as energy storage
element(BOOST Converters).

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