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!

Capacitance potential

  1. May 20, 2003 #1


    User Avatar

    [SOLVED] Capacitance potential


    I have 2 questions here to ask for help with?

    1) a .2F cap is desired. What area must the pplates have if they are to be seperated by a 2.2mm air gap?

    My formula i used with substition was C=e_o (A/d) with e_o = 8.85x10^-12.

    I rounded my answer it was 4.5 so rounded it to 5x10^7m^2 is this correct?

    2)What is the potential at a distance of 5 x 10^-10 m from the nucleus of charge +60e?
    I donno if my formula is correct? ids it V=Ed?

    I donno how to solve for this, can you help point me that way.
    Dx :wink:
  2. jcsd
  3. May 20, 2003 #2

    Tom Mattson

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member


    No, that formula only works for constant, uniform electric field. What you have here is a Coulomb potential, which you should be able to find in your book.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Capacitance potential