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JIPMER2016PhysicsCapacitance

A capacitor is charged and then made to discharge through a resistance. The time constant is . In what time will the potential difference across the capacitor decrease by 10 % ?

Options

  1. A0.1
  2. B0.9
  3. C10 9
  4. D11 10

Correct answer

C. 10 9

Step-by-step solution

As, we know that q=q₀ e^ -t / According to the question, V_C= q C = q₀ C e^ -t / aligned & & q₀ 10 & = q₀ C e^ -t / & & e^ t / & = 10 9 & & t & = 10 9 aligned

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