Q.

The figure shows three circuits with identical batteries, inductors and resistances. Rank the circuits according to the currents through the battery just after the switch is closed, greatest first

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a

I2>I3>I1

b

I2>I1>I3

c

I1>I2>I3

d

I1>I3>I2

answer is A.

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Detailed Solution

I1=0, I2=εR, I3=ε2R⇒I2>I3>I1  Just after the switch is closed , current through inductor is zero .
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The figure shows three circuits with identical batteries, inductors and resistances. Rank the circuits according to the currents through the battery just after the switch is closed, greatest first