Q. Two wattmeter method is used for measurement of power in a balanced three-phase load supplied from a balanced three-phase system. If one of the wattmeters reads half of the other (both positive), then the power factor of the load is
(A) 0.532 (B) 0.632 (C) 0.707 (D) 0.866
Ans: 0.866
Sol:
In two Wattmeter method,
