Power factor and three-phaseQuestion 1401 of 1506

A load draws 40 kVA of apparent power and 28.0 kW of true power. What is the reactive power?

  1. 12.0 kvar
  2. 28.6 kvar
  3. 68.0 kvar
  4. 816 kvar
Show answer

Correct answer: 28.6 kvar

Q = √(S² − P²) = √(40² − 28.0²) = 28.6 kvar.

Source: Computed, 11.4: Practical Power Factor Correction

Practice power factor and three-phase

Questions last reviewed: 18 October 2026