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!

Electrical Potential Energy

  1. Sep 15, 2010 #1
    1. The problem statement, all variables and given/known data

    An axon membrane of a nerve cell is approximately a cylinder of length 12mm and diameter 150micrometres. The membrane has a capacitance of 1.0uFcm^-2. There is a resting potential difference of -90mV between the inside and outside of the cell. How mch electrical potential energy is stored in the membrane?
    How much charge is there on each surface? Give the answer in units of the electron charge.

    2. Relevant equations

    A=2*pi*r*l

    3. The attempt at a solution

    I don't know how to do this question at all
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 15, 2010 #2

    Delphi51

    User Avatar
    Homework Helper

    Use the area formula to find the area of the capacitor and then its capacitance. Then the problem is just a question about a capacitor, which you can answer using one of the capacitor formulas.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Electrical Potential Energy
Loading...