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KVPY2010PhysicsAlternating Current

The circuit shown consists of a switch (S), a battery (B) of emf E, a resistance R , and an inductor L . The current in the circuit at the instant the switch is closed is-

Options

  1. AE / R
  2. BE / R(1-e)
  3. C0

Correct answer

3

Step-by-step solution

Using the equation I = I ₀ (1- e ^ - t t_ L ) Put t =0 we get I =0 Just when the battery is closed inductor provides infinite resistance to the current flow current is zero initially.

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