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Homework Help: Simple parallel plate speed of charge question

  1. Jun 14, 2010 #1
    1. The problem statement, all variables and given/known data
    An alpha particle of +2 elementary charge and mass 6.7*10^-27 can be given some speed by placing it at rest on the positive side of the parallel plate. Ignoring gravity effects what speed does the partial have when it reaches negative plate.

    2. Relevant equations

    3. The attempt at a solution
    my question is is this question solvable?
    i don't think so because the charge on capacitor or the separation between them is not given.

    could someone tell me if the question is solve able plz!!
  2. jcsd
  3. Jun 14, 2010 #2


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    Unless you know the plate separation and the electric field between the plates (or the potential difference between plates), you cannot find a number for the speed. Maybe there is a figure that shows these numbers.
  4. Jun 20, 2010 #3
    u just need to know the potential difference between the plate...no need of distance..and charge is already given
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