Electric Power

Written by Jerry Ratzlaff on . Posted in Electrical Engineering

pie chartPower \((P)\) is the rate of doing work and is measured by the amount of foot pounds of work done in a particular unit of time. A horsepower is a measure of power.


Power formulas

\(\large{ P = V\;I }\)

\(\large{ P = R \; I^2 }\) 

\(\large{ P = \frac{V^2}{R} }\) 

Symbol English Metric
\(\large{ P }\) = power \(\large{W}\) \(\large{\frac{kg-m^2}{s^3}}\)
\(\large{ I }\) = current \(\large{A}\) \(\large{\frac{C}{s}}\)
\(\large{ R }\) = resistance \(\large{\Omega}\) \(\large{\frac{kg-m^2}{s^3-A^2}}\)
\(\large{ V }\) = voltage \(\large{V}\) \(\large{\frac{kg-m^2}{s^3-A}}\)


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Tags: Electrical Equations