Question

In an unloaded transformer, the flux limiting the primary is 10 mWb and secondary is 30 mWb. The coefficient of coupling is ____________ (a) 1 (b) 0.1 (c) 0.33 (d) 0.67 This question was posed to me at a job interview. The doubt is from Advanced Problems on Application of Laplace Transform topic in division 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

The correct option is (c) 0.33 The explanation: Φ11 = (1 – k) Φ1 Or, φ11 = φ1 – φ2 Or, φ11 = 30 – 10 = 20 mWb Now, 20 mWb = (1 – k) 30m Or, 0.67 = 1 – k Or, k = 0.33.