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Q#1 Electro-mechanical Instruments GATE EE 1991 MCQ +2 marks -0.66 marks

Two identical watt-meters are connected to measure power in a 3-phase 3-wire balanced load. What is the load power factor if

(a)

(b) Either  is zero ____________

(a) 1  (b) 0.5

(a) 0.67  (b) 0.98

(a) 1  (b) 0.98

(a) 0.45  (b) 0.5

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