Red Seal Electrician Practice
Power factor and three-phaseQuestion 1392 of 1506

A single-phase motor on a 240 V supply draws 30 A at a power factor of 0.75. What is the true power?

  1. 5.40 kW
  2. 7.20 kW
  3. 4.76 kW
  4. 9.60 kW
Show answer

Correct answer: 5.40 kW

P = V × I × PF = 240 × 30 × 0.75 = 5400 W = 5.40 kW.

Source: Computed, 11.3: Calculating Power Factor

Practice power factor and three-phase

Questions last reviewed: 18 October 2026