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Work needed to move conductor in constant electric field

  1. Feb 8, 2013 #1
    How did Walther Lewin arrive to the result W = x*(σ/2ε0) in 3:00-4:00? Ie, why did he take the average? I don't get it entirely.

     
    Last edited by a moderator: Sep 25, 2014
  2. jcsd
  3. Feb 9, 2013 #2
    never mind this thread, problem is solved.
     
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