Question

In a series RLC circuit excited by a voltage 3e^-t u (t), the resistance is equal to 1 Ω and capacitance = 2 F. For the circuit, the values of I (0^+) and I (∞), are ____________ (a) 0 and 1.5 A (b) 1.5 A and 3 A (c) 3 A and 0 (d) 3 A and 1.5 A This question was addressed to me in class test. This intriguing question comes from Advanced Problems on Two Port Network topic in portion Two-Port Networks of Network Theory Select the correct answer from above options network theory questions and answers, network theory questions pdf, network theory question bank, network theory gate questions and answers pdf, mcq on network theory pdf, gate network theory questions and solutions, network theory mcq Test , ies network theory questions, Network theory Questions for GATE EC Exam, Network Theory MCQ (Multiple Choice Questions)

Answer 1

Correct answer is (c) 3 A and 0 Easiest explanation: I(s) = \frac{6}{s+1} – \frac{3}{s+0.5} Or, I(t) = 6 e^-t – 3 e^-0.5t Putting, t = 0, we get, I(0) = 3A Putting t = ∞, we get, I (∞) = 0.