Power factor and three-phaseQuestion 1155 of 1506

A load draws 10 kVA of apparent power, and 6 kW is true power. What is the reactive power?

  1. 4 kVAR
  2. 16 kVAR
  3. 60 kVAR
  4. 8 kVAR
Show answer

Correct answer: 8 kVAR

Q = sqrt(S squared - P squared) = sqrt(100 - 36) = 8 kVAR.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 11.2: True, Reactive, and Apparent Power

Practice power factor and three-phase

Questions last reviewed: 18 October 2026