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 calculation

  1. Jan 20, 2007 #1
    1. The problem statement, all variables and given/known data
    Consider earth and a cloud layer 700m above earth to be the plates of a parallel-plate capacitor. If the cloud layer has an area of 1.9 km^2, what is the capacitance?

    2. Relevant equations
    Q = CV
    V = Ed
    E = Q/epsiolon*A

    3. The attempt at a solution
    Solving for C gives us C=Q/V. Substituting Ed for V gives us C=Q/Ed. Substituting Q/epsilon*A gives us C = epsilon*A/d. Now I just plug in numbers and I should get the value for C, right? I'm putting in the values given but I am not getting the right answer...any suggestions? Thanks in advance to anyone who helps.
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted