If a resistor Rx is connected between nodes X and Y, Ry between X and – McqOptions

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1.	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 resistance at node Z is?
A.	RyRx/(Rx+Ry+Rz)
B.	RyRx/(Rx+Ry+Rz)
C.	RzRy/(Rx+Ry+Rz)
D.	(Rz+Rx)/(Rx+Ry+Rz)
Answer» D.

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