Question

If a star connected system has equal impedances Z1, then after converting into delta connected system having equal impedances Z2, then? (a) Z2 = Z1 (b) Z2 = 2Z1 (c) Z2 = 3Z1 (d) Z2 = 4Z1 I had been asked this question in a national level competition. Enquiry is from Star to Delta and Delta to Star Transformation in section Polyphase Circuits 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) Z2 = 3Z1 Explanation: If a star connected system has equal impedances Z1, then after converting into delta connected system having equal impedances Z2, then Z2 = 3Z1.