Red Seal Electrician Practice
Power factor and three-phaseQuestion 1390 of 1506

A single-phase motor on a 208 V supply draws 25 A at a power factor of 0.7. What is the true power?

  1. 1.56 kW
  2. 3.64 kW
  3. 7.43 kW
  4. 5.20 kW
Show answer

Correct answer: 3.64 kW

P = V × I × PF = 208 × 25 × 0.7 = 3640 W = 3.64 kW.

Source: Computed, 11.3: Calculating Power Factor

Practice power factor and three-phase

Questions last reviewed: 18 October 2026