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JEE Main 2021 (1 Sep, Shift 2) · Inductors & DC Transients (Mixed)

Inductors & DC Transients (Mixed) question from JEE Main 2021 (1 Sep, Shift 2)

Q9JEE Main 2021 · 1 SEP · SHIFT 2Easy

Inductors & DC Transients (Mixed)

For the given circuit the current i through the battery when the key is closed and the steady state has been reached is __________.

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Answer: (c)

In steady state an ideal inductor acts as a plain wire.
The three $3\ \Omega$ branches are then in parallel: $3/3 = 1\ \Omega$ .
Total resistance $= 2 + 1 = 3\ \Omega$ , so $i = \frac{30}{3} = 10\text{ A}$
So the answer is (c) 10 A.

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