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Two wattmeters are used to measure the power in a 3−phase balanced system. What is the power factor of the load when one wattmeter reads twice the other?
  • a)
    0
  • b)
    0.5
  • c)
    0.866
  • d)
    1
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Two wattmeters are used to measure the power in a3−phase balance...
In a two-wattmeter method, for lagging load
The reading of first wattmeter (W1)=VLILcos⁡(30+ø)
The reading of second wattmeter (W2)=VLILcos⁡(30−ø)
Total power in the circuit (P) = W1+W2
Total reactive power in the circuit Q = √3(W1−W2)
Power factor = cosø
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Two wattmeters are used to measure the power in a3−phase balanced system. What is the power factor of the load when one wattmeter reads twice the other?a)0b)0.5c)0.866d)1Correct answer is option 'C'. Can you explain this answer?
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Two wattmeters are used to measure the power in a3−phase balanced system. What is the power factor of the load when one wattmeter reads twice the other?a)0b)0.5c)0.866d)1Correct answer is option 'C'. Can you explain this answer? for RRB NTPC/ASM/CA/TA 2025 is part of RRB NTPC/ASM/CA/TA preparation. The Question and answers have been prepared according to the RRB NTPC/ASM/CA/TA exam syllabus. Information about Two wattmeters are used to measure the power in a3−phase balanced system. What is the power factor of the load when one wattmeter reads twice the other?a)0b)0.5c)0.866d)1Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for RRB NTPC/ASM/CA/TA 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two wattmeters are used to measure the power in a3−phase balanced system. What is the power factor of the load when one wattmeter reads twice the other?a)0b)0.5c)0.866d)1Correct answer is option 'C'. Can you explain this answer?.
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