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Homework Help: Work Done - Electric field

  1. Apr 26, 2012 #1
    1. The problem statement, all variables and given/known data

    attachment.php?attachmentid=144240&d=1335453216.png

    2. Relevant equations



    3. The attempt at a solution

    now I know this has something to do with energy done on electron and KE.

    apparently work done on electron is:
    W = eV

    BUT surely this implies V is constant. as the charge moves, will not V change?
    hence it should be
    W = 0.5*eV?
     
  2. jcsd
  3. Apr 26, 2012 #2
    found it
    my book says V is the p.d that charges MOVE THROUGH not are in :)
     
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