Question Detail
Question
In a discharging RC circuit, what fraction of the initial charge (Q₀) remains on the capacitor after one time constant (τ)?
Correct Answer
Option A is the correct answer.
Detailed Explanation
Page 29 states that during discharging, 'Charge on plates DROPS by 64%'. This implies that 100% - 64% = 36% of the initial charge remains. Mathematically, at t = τ, q(τ) = Q₀ e⁻¹ ≈ Q₀ * 0.3678.
Hint
Use the formula q(t) = Q₀ e⁻ᵗ/ᴿᶜ and substitute t = τ.