1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Calculating voltage between two points...

  1. Apr 2, 2016 #1
    1. The problem statement, all variables and given/known data

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

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

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

    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


    User Avatar
    2017 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.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted