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IIT JEE 2006 Paper : PHYSICS Section III - Comprehension Passage 2

Each comprehension passage contains 3 questions.
Each question below has only one correct answer.
In the IIT-JEE, you will be awarded 5 marks for each correct answer and −2 for each incorrect answer.
You will be awarded 0 marks for not attempting a question.

A capacitor of capacitance C can be charged with the help of a resistance R by a voltage source V by closing the switch S1 while keeping the switch S2 open. The capacitor can be connected in series with an inductor L by closing the switch S2 and opening the switch S1.
iit_jee_2006_physics_comprehension_2a

Quiz Review
Multiple choice

Your Performance  

Initially, the capacitor is uncharged. Now, switch S1 is closed and S2 is kept open. If the time constant of this circuit is τ, then

  after time interval τ, charge on the capacitor is CV / 2

  after time interval 2τ, charge on the capacitor is CV (1 − e −2 )

  after time interval 2τ, charge on the capacitor is CV(1 − e −1 )

  work done by the voltage source is half of the energy dissipated in the resistor, when the capacitor is fully charged.

  Half-n-half Clue



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