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If a resistor Rx is connected between nodes X and Y, Ry between X and Y, Rz between Y and Z to form a delta connection, then after transformation to star, the resistor at node X is?(a) RxRy/(Rx+Ry+Rz)(b) RxRz/(Rx+Ry+Rz)(c) RzRy/(Rx+Ry+Rz)(d) (Rx+Ry)/(Rx+Ry+Rz)I got this question in quiz.This interesting question is from Star-Delta Transformation topic in portion Useful Theorems in Circuit Analysis of Network Theory

Answer» RIGHT choice is (a) RxRy/(RX+RY+Rz)

Explanation: After transformation to star, the resistor at node X is RxRy/(Rx+Ry+Rz) and this resistance lies between Rx, Ry in star CONNECTION.


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