ElectroMagnetic InductionHard

Question

An inductor (L = 100 mH), a resistor (R = 100 Ω) and a battery (E = 100 V) are initially connected in series as shown in the figure. After a long time the battery is disconnected after short circuiting the points A and B. The current in the circuit 1 min after the circuit is
         

Options

A.1 A
B.1/e A
C.e A
D.0.1 A

Solution

I = I0 e-Rt/L = A

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