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 Fig. 9.89. After a long time the battery is disconnected after short circuiting the points A and B. The current in the circuit 1 ms after the short circuit is :
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a
1/e A
b
e A
c
0.1 A
d
1 A
answer is A.
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Detailed Solution
Long time after, current in the circuitI0=ER=1 AOn short-circuitingI=I0e-RLt=(1)e-100100 x 10-3 x 10-3=1eA