Power factor and three-phaseQuestion 492 of 1506

What is the unit of reactive power?

  1. The var
  2. The watt
  3. The volt-ampere
  4. The ohm
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Correct answer: The var

True power is in watts. Reactive power is in vars.

Source: Trigonometry and Single Phase AC Generation for Electricians (Flinn), 1.6: Power and Impedance Triangles

Practice power factor and three-phase

Questions last reviewed: 18 October 2026