If a 5-bus test system contains 6 transmission lines and one transformer, how many non- zero elements are

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If a 5-bus test system contains 6 transmission lines and one transformer, how many non-zero elements are there in the system Y-bus ?

(A) 25 (B) 12 (C) 11 (D) 19

If a 5-bus test system contains 6 transmission lines and one transformer, 19 non-zero elements are there in the system Y-bus.

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