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Calculating voltage between two points...

  1. Apr 2, 2016 #1
    1. The problem statement, all variables and given/known data
    30bmp7q.png
    14ig6c0.png
    1zcloq1.png

    2. Relevant equations
    The voltage between any two points due to the field from a point charge q is:
    2rcvhok.png
    Kirchoff's voltage laws, which states that the total voltage around a closed loop must be zero, i.e.:
    KVL.gif
    dzfm6s.png

    3. The attempt at a solution
    To find V(e<-d) I used Kirchoff's Voltage Law:
    oaoeg7.png
    To find V(e<-a) I used the fact that you can break voltages into parts:
    21dhfh5.jpg

    But I know my answers are wrong b/c this is what the solutions say:
    657ebn.png

    My question is, what is wrong with the way I'm calculating V(e<-d) and V(e<-a)?
     
  2. jcsd
  3. Apr 3, 2016 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    How did you get the expression for Vc<-e?
    The detour via c is unnecessary.

    The expression for Vc<-a is wrong as well, and I guess it is wrong for the same reason.
     
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