# Voltage

### From Conservapedia

**Voltage** is defined as the *electrical potential* between two points, that is, the potential energy difference between two points due to electrical charge^{[1]} Its unit is the volt (`V`). ` 1 V = 1 W/A`^{[2]}.

An important point to note is that only the *difference* in potential has any practical meaning, not the absolute value. Therefore, physicists often speak of `ΔV _{AB}`, or

*the difference in voltage between point A and point B*. This voltage can be measured in either direction:

`ΔV`_{AB}= V_{A}- V_{B}= -(V_{B}- V_{A}) = -V_{BA}

For practical purposes, people often choose an arbitrary *ground* in a circuit and define `V _{ground}` as 0. This allows them to give every point on the circuit a single voltage, since they are actually talking about the difference in voltage between that point and the

*ground*. For example, in a circuit with a ground:

`ΔV`_{C,ground}= V_{C}- V_{ground}= V_{C}- 0 = V_{C}

## See Also

## References

- ↑ Schwarz, Stephen E. and William G. Oldham.
*Electrical Engineering: An Introduction, 2e.*Oxford University Press: 1993. - ↑ The International System of Units, 8th edition. Organisation Intergouvernementale de la Convention du Mètre, 2006.