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 = 4Z1I 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

If a star connected system has equal impedances Z1, then after convert

1.	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 = 4Z1I 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
Answer» 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.

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