Electric Current

Written by Jerry Ratzlaff on . Posted in Electrical Engineering

pie chartCurrent \((I)\) is the rate of flow of electricity in a circuit, measured in amperes.  Amp is a unit of current.  One ampere (amp) is the current flowing through one ohm of resistance at one volt potential.

 

Current (Amp) formulas

\(\large{ Amps = \frac{Volts}{Ohms} = I = \frac{V}{R} }\)   
\(\large{ Amps = \frac{Watts}{Volts} = I = \frac{P}{V} }\)   
\(\large{ Amps = \sqrt{\frac{Watts}{Ohms}} = I = \sqrt{\frac{P}{R}} }\)   

Where:

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

 

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Tags: Equations for Electrical