Physics · Three-Phase AC Circuits
A 3-phase, star-connected, balanced load is supplied from a 3-phase, 400 V (rms), balanced voltage source with phase sequence R-Y-B. A wattmeter is connected such that its current coil is in the R-line and its voltage coil is connected between the Y and B lines. If the wattmeter reading is -400 W and the line current is IR = 2 A (rms), then what is the power factor of the load per phase?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 10.707 lagging
- 20.866 leading
- 30.5 leading✓
- 4Unity
Correct answer
0.5 leading
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