Electric Power

Written by Jerry Ratzlaff on . Posted in Electrical Engineering

Power $$(P)$$ 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 $$\large{V}$$ $$\large{\frac{kg-m^2}{s^3-A}}$$

Tags: Electrical Equations