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Network TheoryAC Power

A load has apparent power 1000 VA and real power 600 W. The magnitude of reactive power is?

  • A400 var
  • B600 var
  • C800 var
  • D1600 var
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Correct Answer: C. 800 var
Explanation: Using S^2=P^2+Q^2, Q=√(1000^2-600^2)=800 var.
Reference: Standard network theory: ac power
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