Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Capacitance/
Question 31549
JEE Physics · Medium

Capacitance: Practical Charging Time MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Practice and revisionDetailed answer reviewMobile-friendly flow
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.

Review Capacitance notesStart timed chapter practice