Power factor and three-phaseQuestion 1397 of 1506

A load draws 30 kVA of apparent power and 25.5 kW of true power. What is the reactive power?

  1. 39.4 kvar
  2. 4.50 kvar
  3. 55.5 kvar
  4. 15.8 kvar
Show answer

Correct answer: 15.8 kvar

Q = √(S² − P²) = √(30² − 25.5²) = 15.8 kvar.

Source: Computed, 11.4: Practical Power Factor Correction

Practice power factor and three-phase

Questions last reviewed: 18 October 2026