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Homework Help: Physics Problem

  1. Nov 11, 2007 #1
    Physics Diagram.jpg

    An electron with a velocity of 3.00x10^6m/s[horizontally] passes through two horizontal parallel plates, as in the attached diagram. The magnitude of the electric field between the plates is 120N/C. The plates are 4.0cm across. Edge effects are negligible.
    a) Calculate the vertical deflection of the electron.

    I'm not sure what I should do here and I would appreciate any help. I think it might be [tex]\epsilon[/tex]=[tex]\frac{kq}{r^2}[/tex], but I'm not exactly sure. Thanks.
  2. jcsd
  3. Nov 11, 2007 #2

    Doc Al

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    Staff: Mentor

    What's the force on the electron while it's between the plates? The resulting acceleration? How long does it spend between the plates?
    That's an equation for the field from a point charge, which is not relevant here. You are given the field, so find the force.
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