Meters and troubleshootingQuestion 1168 of 1506

A technician reads 480 V and 20 A on a single-phase load. A wattmeter shows 7.68 kW. What is the power factor?

  1. 1.25
  2. 0.64
  3. 0.8
  4. 0.48
Show answer

Correct answer: 0.8

Apparent power = 480 V x 20 A = 9.6 kVA. Power factor = 7.68 kW / 9.6 kVA = 0.8.

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

Practice meters and troubleshooting

Questions last reviewed: 18 October 2026