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Network TheoryAC Power

A load has complex power S=4-j3 kVA. Its power factor characteristic is?

  • A0.8 leading
  • B0.8 lagging
  • C0.6 leading
  • D0.6 lagging
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Correct Answer: A. 0.8 leading
Explanation: |S|=5 kVA, so pf=4/5=0.8. Negative reactive power indicates capacitive behavior, hence leading power factor.
Reference: Standard network theory: leading power factor
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