Exam Questions Paper - ECE Questions and Answers

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V(t) across R₂ for t > 0 is given by,

2 - 2e^-2t

2 - e^-2t

2 - e^-t

1 - e^-t

Answer : Option B

Explanation :

Time constant t = RC

R_eq for t > 0 is; R₁ = R₂ =

C = 1F

∴ t = 1/2

∴ V(t) = V_F - (V_F - V_i)e^-t/z

V_F = V_R₂(t = ∞) = 2 V

V_i = V_R₂ (t = 0⁺) = 1 V

V(t) = 2 - (2 - 1)e^-t/1/2

V(t) = 2 - e^-2t.

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