Which of the following statement is correct for two wattmeters method of power measurement in 3 phase circuit?
A. Power can be measured by this method only for star connected loads
B. When two wattmeters have equal readings power factor is 0.5.
C. When power factor is 1, one of the wattmeters readings is zero
D. When the two wattmeter read equal and opposite, p.f. is zero.
Show Answer
Answer: D
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