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If the resistors of star connected system are R1, R2, R3 then the resistance between 1 and 2 in delta connected system will be? (a) (R1R2 + R2R3 + R3R1)/R3 (b) (R1R2 + R2R3 + R3R1)/R1 (c) (R1R2 + R2R3 + R3R1)/R2 (d) (R1R2 + R2R3 + R3R1)/(R1+R2) The question was posed to me by my college professor while I was bunking the class. I'm obligated to ask this question of Star-Delta Transformation topic in section Useful Theorems 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)

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Correct option is (a) (R1R2 + R2R3 + R3R1)/R3 To explain: After transformation to delta, the resistance between 1 and 2 in delta connected system will be (R1R2 + R2R3 + R3R1)/R3 and this resistance lies between R1, R2 in delta connection.

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