IRWIN 9e 9_FE-1

IRWIN 9e 9_FE-1 - Irwin, Basic Engineering Circuit...

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Irwin, Basic Engineering Circuit Analysis, 9/E 1 Chapter 9: Steady – State Power Analysis Problem 9.FE-1 SOLUTION: The correct answer is c . From the power triangle: old old old P Q tan var 120 45 tan 120 k k Q old kVA VA k j k S old 45 170 ) 120 120 ( new old new jQ P S 19 . 18 ) 95 . 0 ( cos 1 new new old new P Q tan var 43 . 39 19 . 18 tan
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