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Millikan oil drop experiment

  1. Feb 23, 2010 #1
    1. The problem statement, all variables and given/known data
    in a Millikan oil drop experiment, a uniform electric filed of 1.92 x 10^5 N/C is maintained in a region between two plates seperated by 1.5 cm. Find the potential difference between the plates.


    2. Relevant equations
    mg = q x E


    3. The attempt at a solution
    in order to find the q and hence find the voltage/potential you need to have mass. there is no mass given. I assume once you have mass you get q and from there you can find voltage using k(q/r)
     
  2. jcsd
  3. Feb 23, 2010 #2
    To find V, the pd between the plates:
    In a uniform electric field between parallel plates, the field can be calculated from the potential gradient. You have the field strength given and you know the plate separation.
    Does this help?
     
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