Electric Field

[Little Bang]

Could the energy of a given point in an electric field be expressed in electron volts?

[Qfwfq]

Could the energy of a given point in an electric field be expressed in electron volts?

At a given point, there are two similar things one may define:

 

One is the electric potential, and the volt is a unit for measuring it. It is the ratio of a proof charge's energy to its charge. Therefore, volt times a unit of charge gives a unit of energy.

 

Another is the energy density of the field itself, which is a ratio of energy to volume and is given by [imath]\frac{\epsilon_0}{2}E^2[/imath]. If you take some volume around a given position, the associated energy can be expressed in joule, erg, eV or whichever units of energy best suit the quantity in question.

 

Presumably you meant the second thing, either for some small volume or, if you talk about a single point, the unit could be eV per cubic nanometre for instance.

[Little Bang]

So if I had two different electric fields and I chose a one cubic nanometer point in each field separated by a distance r what would the equation look like to produce the force answer in electron volts?

[Qfwfq]

So if I had two different electric fields and I chose a one cubic nanometer point in each field separated by a distance r what would the equation look like to produce the force answer in electron volts?

I can't make much sense of the question.

[joekgamer]

http://en.wikipedia.org/wiki/Electric_force