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JEE Advanced2006PhysicsAlternating CurrentActual

Paragraph: The capacitor of capacitance C can be charged (with the help of a resistance R ) by a voltage source V , by closing switch S₁ while keeping switch S₂ open. The capacitor can be connected in series with an inductor L by closing switch S₂ and opening S₁ . Question: After the capacitor gets fully charged, S₁ is opened and S₂ is closed so that the inductor is connected in series with the capacitor. Then,

Options

  1. Aat t=0 , energy stored in the circuit is purely in the form of magnetic energy
  2. Bat any time t>0 , current in the circuit is in the same direction
  3. Cat t>0 , there is no exchange of energy between the inductor and capacitor
  4. Dat any time t>0 , maximum instantaneous current in the circuit may V C L

Correct answer

D. at any time t>0 , maximum instantaneous current in the circuit may V C L

Step-by-step solution

From conservation of energy, 1 2 L I_ ^2= 1 2 C V^2 I_ =V C L

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