Physics · Electrical Measurements
With the usual notations, which of the following equations correctly expresses the power factor angle (φ) measured using the two-wattmeter method in a balanced three-phase system?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1φ = tan-1W1 - W2W1 + W2
- 2φ = cos-1 √3W1 - W2W1 + W2
- 3φ = tan-1 √3W1 - W2W1 + W2✓
- 4φ = cos-1W1 - W2W1 + W2
Correct answer
φ = tan-1 √3W1 - W2W1 + W2
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