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If the resistors of star connected system are R1, R2, R3 then the resistance between 2 and 3 in delta connected system will be?(a) (R1R2 + R2R3 + R3R1)/R3(b) (R1R2 + R2R3 + R3R1)/R2(c) (R1R2 + R2R3 + R3R1)/R1(d) (R1R2 + R2R3 + R3R1)/(R3+R2)I had been asked this question during an online exam.The origin of the question is Star-Delta Transformation in chapter Useful Theorems in Circuit Analysis of Network Theory

Answer» RIGHT OPTION is (c) (R1R2 + R2R3 + R3R1)/R1

To explain: After TRANSFORMATION to delta, the resistance between 2 and 3 in delta connected system will be(R1R2 + R2R3 + R3R1)/R1 and this resistance lies between R3, R2 in delta CONNECTION.


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