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Network TheoryAC Power

A load draws 10 A RMS from a 200 V RMS supply at power factor 0.6 lagging. Its real power is?

  • A600 W
  • B1200 W
  • C1600 W
  • D2000 W
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Correct Answer: B. 1200 W
Explanation: P=VI cos(phi)=200×10×0.6=1200 W.
Reference: Standard network theory: single-phase real power numerical
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