Red Seal Electrician Practice
Power factor and three-phaseQuestion 1170 of 1506

A 240 V, 60 Hz inductive load takes 2 kVAR of reactive power. About what capacitor size cancels it?

  1. 579 microfarads
  2. 15 microfarads
  3. 184 microfarads
  4. 92 microfarads
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Correct answer: 92 microfarads

The capacitor needs 2 kVAR. XC = V squared / Q = 240 x 240 / 2000 = 28.8 ohms. C = 1 / (2 x pi x 60 x 28.8) = about 92 microfarads.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 11.4: Practical Power Factor Correction

Practice power factor and three-phase

Questions last reviewed: 18 October 2026