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, as shown in the figure. If the wattmeter reading is −400 W and the line current is 𝐼_𝑅 = 2 A (rms), then the power factor of the load per phase is

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GATE Electrical Engineering (EE) 2023 Solved Paper