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Questions and Answers
For inductive loads, as the phase angle $\phi$ increases, what happens to the load power factor?
For inductive loads, as the phase angle $\phi$ increases, what happens to the load power factor?
- It remains constant
- It cannot be determined
- It decreases (correct)
- It increases
At what phase angle does one of the wattmeters read zero and the other reads the total three phase active power for an inductive load?
At what phase angle does one of the wattmeters read zero and the other reads the total three phase active power for an inductive load?
- $60°$ Lag (correct)
- $90°$ Lag
- $30°$ Lag
- $45°$ Lag
What happens to the wattmeter readings when the phase angle is greater than $60°$ (or power factor of the load is less than $0.5$ Lag) for an inductive load?
What happens to the wattmeter readings when the phase angle is greater than $60°$ (or power factor of the load is less than $0.5$ Lag) for an inductive load?
- Both wattmeters read zero
- Both wattmeters read positive
- One of the wattmeters reads negative (correct)
- Both wattmeters read negative
For capacitive loads, which equation represents the reading of wattmeter W1?
For capacitive loads, which equation represents the reading of wattmeter W1?
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At what phase angle do both wattmeters read positive for a capacitive load?
At what phase angle do both wattmeters read positive for a capacitive load?
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