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!

What is the charge that can be stored on this capacitor

  1. Jul 17, 2008 #1
    1. The problem statement, all variables and given/known data

    A parallel-plate capacitor has dimensions 3.5cm x 5.2 cm. The plates are separated by a 1.1-mm thickness of paper (dielectric constant k = 3.7). What is the charge that can be stored on this capacitor, when connected to a 1.5-V battery? (E0 = 8.85 x 10^-12 C^2/Nm^2)

    2. Relevant equations

    C=Keo(A/d)
    Qmax=(Cdelta)Vmax

    3. The attempt at a solution


    C=Keo(A/d)
    =3.7(8.85E-12)(18.2E-4/1.1E-3)
    =200E-12 F

    Qmax=C(deltaVmax)
    =(200E-12)(1.5V)
    =300E-12 C

    300E-12 C does not seem like the right answer
     
  2. jcsd
  3. Jul 17, 2008 #2

    alphysicist

    User Avatar
    Homework Helper

    Hi ziplock2k,

    I don't think those numbers give 200e-12 F.
     
  4. Jul 17, 2008 #3
    C=Keo(A/d)
    =3.7(8.85E-12)(18.2E-4/1.1E-3)
    =54.18E-12

    Qmax=C(deltaVmax)
    =(54.18E-12)(1.5V)
    =300E-12 C

    81.27E-12 C

    Is my new calculations right?
     
  5. Jul 17, 2008 #4

    alphysicist

    User Avatar
    Homework Helper

    That last number looks right to me.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: What is the charge that can be stored on this capacitor
  1. Capacitor stores what? (Replies: 3)

Loading...