Question

In the circuit given below the value of resistance Req is _____________ (a) 10 Ω (b) 11.86 Ω (c) 11.18 Ω (d) 25 Ω I got this question in an interview for internship. This key question is from Advanced Problems on Two Port Network in section 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

The correct option is (c) 11.18 Ω To explain I would say: The circuit is as shown in figure below. Req = 5 + \frac{10(R_{eq}+5)}{10 + 5 + R_{eq}} Or, R_{eq}^2 + 15Req = 5Req + 75 + 10Req + 50 Or, R_{eq} = \sqrt{125} = 11.18 Ω.