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Define polarization.

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I'm Msc student in electrical engineering  and my project in control of the UPFC can you help me ?

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 When The dc converter in figure shown has a resistance load of R = 10 Ω and the input voltage is Vs 220 V the converter switch remains on, its voltage drop is Vo -2 V. The chopping frequency is fI K sW Vs If the duty cycle is 50%, determine: (a) the average output voltage V (b) the RMS output voltage Vo (c) the converter efficiency (d) the effective input resistance of the converter

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A. active power B. reactive power C. apparent power D. A & C E. B & C

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