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Question 31549
JEE Physics · Medium

Capacitance: Practical Charging Time MCQ

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Practical Charging TimeMediumQuestion 31549

Question

A capacitor is considered fully charged (99%) after approximately:
  1. A
    1τ
  2. B
    2τ
  3. C
    3τ
  4. D
    5τ
    Correct

Correct answer

5τ

Explanation

After 5τ: Q/Q₀ = 1 − e^{−5} ≈ 0.993. Engineers use 5τ as 'fully charged' for practical purposes.

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