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: 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
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

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



Loading...
Similar Threads for Capacitance calculation Date
Capacitors in series or in parallel? - calculating CR Jun 28, 2017
Calculating the Charge on Capacitor Feb 8, 2017
Calculating Capacitance in a Mixed Circuit? Feb 9, 2016