SUMMARY
The correct method to calculate apparent power (S) and power factor (pf) for a load operating at a voltage of 125V-rms, absorbing 55W of real power (P) and 26VAR of reactive power (Q) is established. The apparent power is calculated using the formula S = sqrt[P^2 + Q^2], resulting in S = 60.8 VA. The power factor is determined using pf = P / S, yielding a value of pf = 0.90, indicating a lagging power factor due to the inductive nature of the load.
PREREQUISITES
- Understanding of AC circuit analysis
- Familiarity with power calculations in electrical engineering
- Knowledge of reactive power and its implications
- Basic proficiency in using square root calculations
NEXT STEPS
- Study the implications of lagging power factor in inductive loads
- Explore the effects of power factor correction techniques
- Learn about the relationship between real power, reactive power, and apparent power in AC circuits
- Investigate the use of power factor meters in electrical systems
USEFUL FOR
Electrical engineers, students studying AC circuit theory, and professionals involved in power management and optimization will benefit from this discussion.