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Physics · Capacitors and R-C Circuits

JEE Main 2026 — 4 April, Morning Shift — Question 16

Consider a circuit with a capacitor (20 μF), resistor (100 Ω) and two identical diodes. Diode forward resistance = 10 Ω. The time constant of the circuit is α×10−3\alpha\times10^{-3} s. The value of α\alpha is

Question figure
  1. Option A:

    2.2

    Correct
  2. Option B:

    2

  3. Option C:

    2.1

  4. Option D:

    2.4

Answer: A

Step-by-step solution

τ = R_eq C. In forward bias, total R = 100 + 10 = 110 Ω. τ = 110 × 20×10⁻⁶ = 2.2×10⁻³ s

Answer key and solution verified before publishing.

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Exam
JEE Main 2026
Paper
4 April, Morning Shift
Subject
Physics
Chapter
Capacitors and R-C Circuits
Topic
Charging and Discharging of R-C Circuits

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