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Electric Voltage

 

Electric Voltage Formula

\( V \;=\; I \cdot R \)     (Electric Voltage)

\( I \;=\; \dfrac{ V }{ R }\)

\( R \;=\  \dfrac{ V }{ I }\)
Symbol English Metric
\( V \) = voltage \(V\) \(V\)
\( I \) = current \(A\) \(A\)
\( R \) = resistance \(\Omega\) \(\Omega\)

pie chartElectric voltage V or E, also known as electric potential difference, is the measure of the electric potential energy per unit charge that is required to move a charge from one point to another in an electric field.  A unit of electrical pressure.  One volt is the amount of pressure that will cause one ampere of current in one ohm of resistance.

Electric Voltage Formula

\( V \;=\; \dfrac{ P }{ I }\)     (Electric Voltage)

\( P \;=\;  V \cdot I  \)

\( I \;=\;  \dfrac{ P }{ V }\)
Symbol English Metric
\( V \) = voltage \(V\) \(V\)
\( I \) = current \(A\) \(A\)
\( P \) = power \(P\) \(P\)

pie chartIn simple terms, voltage is the force that drives the electric current through a conductor.  It is similar to the pressure that drives water through a pipe.  The greater the voltage, the more electric charge will flow through a circuit.  Voltage can be calculated using Ohm's Law, which relates voltage, current, and resistance in an electrical circuit.

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Electric Voltage Formula

\( V \;=\; \sqrt{ P \cdot R } \)     (Electric Voltage)

\( P \;=\;  \dfrac{ V^2 }{ R }\)

\( R \;=\;  \dfrac{ V^2 }{ P }\)
Symbol English Metric
\( V \) = voltage \(V\) \(V\)
\( P \) = power \(P\) \(P\)
\( R \) = resistance \(\Omega\) \(\Omega\)

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Voltage in Series Formula

  •  The total voltage of several voltage sources or drops in series.
\( V_t  \;=\;  V_1 + V_2 + V_3 +\; ...    \) 
Symbol English Metric
\( V_t \) = voltage total source or drop \(V\) \(V\)
\( V_1, V_2, V_3 \) = voltage source or drop \(V\) \(V\)

   

 

 

 

 

 

 

 

Voltage in Parallel Formula

  •  The voltage sources or drops in parallel having equal voltages.
\( V_t  \;=\;  V_1  \;=\; V_2 \;=\; V_3 \;=\;\; ...    \) 
Symbol English Metric
\( V_t \) = voltage total source or drop \(V\) \(V\)
\( V_1, V_2, V_3 \) = voltage source or drop \(V\) \(V\)