1. Not finding help here? Sign up for a free 30min 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!

Finding the potential between two charged conducting shells?

  1. Mar 7, 2012 #1
    1. The problem statement, all variables and given/known data
    Suppose we have an outer shell with charge -2Q and radius b. We also have an inner shell with charge Q and radius a. what is the potential when a<r<b.


    2. Relevant equations
    E=kQ/r^2
    V=kQ/r
    E=-dV/dx

    3. The attempt at a solution
    The method I have been using according to my professor is a mathematical coincidence and the proper method to solving this is to use integrals.

    How I solve it is that I sum the potential of the outer shell with the inner shell. So since we are inside the -2Q shell we have a constant V=-2Q/b. Since we are outside the Q shell we have V=Q/r.

    Thus the resulting potential is V=Q/r-2Q/b.


    I would like to learn the proper method where you have to take infinity as a reference and integrate. And then you get +C somewhere... lol Could someone please explain this? Thanks!
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted