Electronics and Communication Engineering - Exam Questions Papers - Discussion
Discussion Forum : Exam Questions Papers - Exam Paper 8 (Q.No. 13)
13.
V(t) across R2 for t > 0 is given by,
Answer: Option
Explanation:
Time constant t = RC
Req for t > 0 is; R1 = R2 = 
C = 1F
∴ t = 1/2
∴ V(t) = VF - (VF - Vi)e-t/z
VF = VR2(t = ∞) = 2 V
Vi = VR2 (t = 0+) = 1 V
V(t) = 2 - (2 - 1)e-t/1/2
V(t) = 2 - e-2t.
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