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A capacitor improves power factor by supplying

  • A.additional active power to the load
  • B.a voltage boost at the point of connection
  • C.harmonic current that offsets the distortion already present
  • D.leading reactive current that cancels the load's lagging current

Answer: D

The reactive component drawn from the supply falls while the active component is untouched, so the same work is done with less current. Capacitors do nothing for the active power and can make harmonic problems worse rather than better.

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