SUMMARY
The power (W) of a sine wave electrical signal is calculated using the formula P = V * I when the voltage and current are in phase, applicable for purely resistive loads. Frequency does not affect power in this scenario, as demonstrated with examples of 100 volts at 60Hz, 120Hz, and 1kHz yielding the same power output. However, in inductive circuits, the relationship becomes complex due to the wave shape and potential skin effect at higher frequencies. For accurate measurements, especially with non-resistive loads, additional tools such as a function generator may be necessary.
PREREQUISITES
- Understanding of AC power calculations
- Knowledge of resistive and inductive loads
- Familiarity with the concept of phase angle in electrical signals
- Basic principles of waveforms, including sine and square waves
NEXT STEPS
- Research the skin effect in AC circuits
- Learn about the impact of wave shape on power in inductive circuits
- Explore the use of function generators for sine wave production
- Study the differences between resistive and reactive power
USEFUL FOR
Electrical engineers, physics students, and anyone involved in AC circuit analysis or power calculations will benefit from this discussion.