Question

The current equation for the circuit shown below is? (a) I=4/s-2/(s-5) (b) I=4/s-2/(s+5) (c) I=4/s+2/(s+5) (d) I=4/s+2/(s-5) I had been asked this question in an internship interview. This interesting question is from The Impulse Function in Circuit Analysis topic in section Application of the Laplace Transform in Circuit Analysis 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

Right choice is (c) I=4/s+2/(s+5) The best I can explain: After the switch has been opened, the current in L1 is the same as the current in L1. The current equation is I=(100/s+30)/(5s+25). On solving we get I = 4/s-2/(s+5).