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Homework Help: Find the change in electric potential energy

  1. Feb 13, 2010 #1
    1. The problem statement, all variables and given/known data

    A uniform electric field with a magnitude of 6890 N/C points in the positive x-direction. Find the change in electric potential energy when a +12.5 µC charge is moved 5.87 cm in the following directions.

    In the positive x-direction
    In the negative x-direction

    2. Relevant equations

    U = qEd, right?

    3. The attempt at a solution

    U = (12.5 x10^-6)(6890)(0.00587) = .00050555 J or .50555 mJ

    But that isn't correct, please help ;)
  2. jcsd
  3. Feb 13, 2010 #2


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    Homework Helper

    Check the d value.
  4. Feb 13, 2010 #3
    Whoops, thank you. I accidentally had millimeters

    Got the right answer now ;)
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