Question

The readings of the two watt meters used to measure power in a capacitive load are -3000W and 8000W respectively. Find the power factor. (a) 0.25 (b) 0.5 (c) 0.75 (d) 1 I had been asked this question in semester exam. The above asked question is from Power Measurement in Three-Phase Circuits topic in section Polyphase Circuits of Network Theory Select the correct answer from above options network theory questions and answers, network theory questions pdf, network theory question bank, network theory gate questions and answers pdf, mcq on network theory pdf, gate network theory questions and solutions, network theory mcq Test , ies network theory questions, Network theory Questions for GATE EC Exam, Network Theory MCQ (Multiple Choice Questions)

Answer 1

Correct answer is (a) 0.25 The explanation: As the load is capacitive, the wattmeter connected in the leading phase gives less value. WR=-3000. WY=8000. tanØ = √3 (8000-(-3000))/5000=3.81 => Ø = 75.29⁰ => cosØ = 0.25.