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Homework Help: Uniform Electric Field

  1. Jun 11, 2007 #1
    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. jcsd
  3. Jun 11, 2007 #2

    Chi Meson

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    Here's a hint. A "volt" is a "joule per coulomb" and the electric field can be measured in units of "volts per meter"
  4. Jun 11, 2007 #3
    Ok, might this be

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

    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
  5. Jun 11, 2007 #4
    yes you are correct
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