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Q.

In the given circuit, let i1 be the current drawn from battery at time t = 0 and i2 be steady current at t=∞, then the ratio i1i2 is

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a

1.0

b

0.8

c

1.2

d

1.5

answer is B.

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Detailed Solution

At t = 0, inductor behaves as open circuit, soi1=1010=1 AAt t=∞ inductor behave as short circuit, soi2=108=54 AHence, i1i2=15/4=45=0.8
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In the given circuit, let i1 be the current drawn from battery at time t = 0 and i2 be steady current at t=∞, then the ratio i1i2 is