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JEE Main2006PhysicsAlternating CurrentActual

An inductor (L=100 mH ) , a resistor (R=100 ) 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 ~mm after the circuit is

Options

  1. A1 ~A
  2. B1 / e A
  3. Ce ~A
  4. D0.1 ~A

Correct answer

B. 1 / e A

Step-by-step solution

I = I ₀ e ^ - Rt / L = 1 e A

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