Power factor and three-phaseQuestion 1395 of 1506

A single-phase motor on a 120 V supply draws 10 A at a power factor of 0.85. What is the true power?

0.632 kW
1.02 kW
0.180 kW
1.20 kW

Show answer

Correct answer: 1.02 kW

P = V × I × PF = 120 × 10 × 0.85 = 1020 W = 1.02 kW.

Source: Computed, 11.3: Calculating Power Factor

Questions last reviewed: 18 October 2026

Red Seal Electrician Practice needs JavaScript to run. Use its questions for practice. The real pass mark is usually 70%. Check it with your province or territory's apprenticeship office.