Physics · Electrical Measurements
What is the correction factor of an electrodynamometer wattmeter at a lagging power factor? (Where φ is the phase angle between the voltage applied to the pressure coil and the current in the current coil, and β is the phase angle of the pressure coil circuit itself.)
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1cosφcosβ cos(φ - β)✓
- 2cosφcosβ sin(φ + β)
- 3cosφcosβ sin(φ - β)
- 4cosφcosβ cos(φ + β)
Correct answer
cosφcosβ cos(φ - β)
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