Average Power in AC Circuit (P_avg = V_rms I_rms cos φ)
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P_avg = V_rms I_rms cos φ
What each symbol means
| Symbol | What it stands for |
|---|---|
| I_rms | RMS current (A) |
| P_avg | Real average power (W) |
| V_rms | RMS voltage (V) |
| cos φ | Power factor |
When to use this
Sinusoidal steady state; V and I rms for same port; φ is phase between v and i.