Electric Current

on . Posted in Electrical Engineering

pie chartElectric current, abbreviated as I, is the flow of electric charge in a circuit or a conductor.  The current flow is caused by the movement of electrons, which are negatively charged particles, through a conductor such as a wire.  The rate of flow of electric charge (current) is typically determined by the voltage (potential difference) applied across the conductor and the resistance of the conductor.  The relationship between voltage, current, and resistance is described by Ohm's Law, which states that the current through a conductor is directly proportional to the voltage applied across it and inversely proportional to its resistance.

 

Electric Current formula

\( I =  V \;/\; R \)     (Electric Current)

\( V = I \; R  \)

\( R =  V \;/\; I \)

Symbol English Metric
\(\ I \) = electric current \(I\) \(C \;/\; s\)
\( V \) = electric voltage   \(V\) \(kg-m^2 \;/\; s^3-A\)
\( R \) = electric resistance \(\Omega\) \(kg-m^2 \;/\; s^3-A^2\)

 

Electric Current formula

\( I =  P \;/\; V \)     (Electric Current)

\( P =  I \; V  \)

\( V =  P \;/\; I \)

Symbol English Metric
\( I \) = electric current \(I\) \(C \;/\;  s\)
\( P \) = electric power \(P\) \(kg-m^2 \;/\;  s^3\)
\( V \) = electric voltage \(V\) \(kg-m^2 \;/\;  s^3-A\)

 

Electric Current formula

\( I = \sqrt{  P \;/\; R } \)     (Electric Current)

\( P =  I^2 \; R  \)

\( R =  P \;/\; I^2 \)

Symbol English Metric
\( I \) = electric current \(I\) \(C \;/\;  s\)
\( P \) = electric power \(P\) \(kg-m^2 \;/\; s^3\)
\( R \) = electric resistance \(\Omega\) \(kg-m^2 \;/\;  s^3-A^2\)

 

Motor Current Formulas

\(V\) = Voltage  -  \(I\) = Amps  -  \(PF\) = Power Factor  -  \(\eta\) = Efficiency  -  \(P\) = Power

To Find Direct Current Alternating Current
Single Phase Two Phase Four Wire Three Phase
Curremt \(\large{\frac{ P }{ V \; \eta } }\) \(\large{\frac{ P }{ V \; \eta \; PF } }\) - \(\large{\frac{ P }{ 1.732 \; V \; \eta \; PF } }\)

 

P D Logo 1

Tags: Electrical Current Motor