Question

Three inductors each 30 mH are connected in delta. The value of inductance or each arm of equivalent star is _____________ (a) 10 mH (b) 15 mH (c) 30 mH (d) 90 mH The question was posed to me during an internship interview. The origin of the question is Advanced Problems Involving Complex Circuit Diagram topic in chapter Network Theory and Complex Circuit Diagram 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 option is (a) 10 mH For explanation: We know that if an inductor L is connected in delta, then the equivalent star of each arm = \frac{L X L}{L+L+L} Given that, L = 30 mH = \frac{30 X 30}{30+30+30} = \frac{900}{90} = 10 mH.