Power factor and three-phaseQuestion 1398 of 1506

A load draws 25 kVA of apparent power and 15.0 kW of true power. What is the reactive power?

  1. 40.0 kvar
  2. 29.2 kvar
  3. 400 kvar
  4. 20.0 kvar
Show answer

Correct answer: 20.0 kvar

Q = √(S² − P²) = √(25² − 15.0²) = 20.0 kvar.

Source: Computed, 11.4: Practical Power Factor Correction

Practice power factor and three-phase

Questions last reviewed: 18 October 2026