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Average AC power
P = V_rms I_rms cos φ
Where: Iᵣₘₛ = Iᵣₘₛ, P = power (W) / pressure (Pa), Vᵣₘₛ = Vᵣₘₛ, φ = work function (J) / phase (rad)
Solved example
Given: I_rms = 7, V_rms = 5, phi = 60°
Find: P (power (W) / pressure (Pa))
- Formula: P = Iᵣₘₛ·Vᵣₘₛ·cos(φ)
- Substitute the values: P = 5·7·cos(60°)
- Result: P = 17.5 W
Answer: P = 17.5 W
Calculator
How to calculate Average AC power
- Write down the formula: P = V_rms I_rms cos φ.
- Note the known values (Iᵣₘₛ, Vᵣₘₛ, φ).
- Substitute them and simplify to find P.
- Use the calculator above to solve for any letter.
Frequently asked questions
What is the formula for Average AC power?
The formula is P = V_rms I_rms cos φ, where Iᵣₘₛ = Iᵣₘₛ, P = power (W) / pressure (Pa), Vᵣₘₛ = Vᵣₘₛ, φ = work function (J) / phase (rad).
What is Average AC power when I_rms = 7, V_rms = 5, phi = 60°?
P = 17.5 W. Substitute the values into P = V_rms I_rms cos φ and simplify.
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