Bac F3 Bénin Practice Questions - Baccalauréat Série F3 (Électrotechnique) - Bénin Exam

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In an unbalanced four-wire three-phase star system with neutral conductor, phase currents are measured as i1(t) = 20*sin(omega*t) A, i2(t) = 20*sin(omega*t - 2*pi/3) A, and i3(t) = 0 A (phase 3 open). What is the RMS magnitude of the current flowing in the neutral conductor I_N?

I_N = 0 A I_N = 10.0 A I_N = 28.3 A I_N = 14.14 A

Correct Answer:

I_N = 14.14 A

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