# Uniform Electric Field

1. Jun 11, 2007

### grscott_2000

Can someone tell me the correct formula to use to find the uniform electric field between two plates? I can do this using a point charge but I'm assuming that this is different.

I am given the energy of an electron (as it is an electron I also know the charge) and the distance between the plates but I am not given a voltage.

Is there a way I can calculate the electric field using just these values?

2. Jun 11, 2007

### Chi Meson

Yes.

Here's a hint. A "volt" is a "joule per coulomb" and the electric field can be measured in units of "volts per meter"

3. Jun 11, 2007

### grscott_2000

Ok, might this be

Energy(j) x Charge(C) = Electric Field (Vm-1)
Separation(m)

Hmm, maybe thinking about it I might be wrong here....

If a volt is joule per coulomb, it should be written JC^-1 indicating that the C value should be on the bottom, so maybe it should be

Energy(J) / (Charge(C) * Seperation(M)) = Electric field

Last edited: Jun 11, 2007
4. Jun 11, 2007

### ice109

yes you are correct