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 do I have the totally wrong values/equation or am I converting wrong?

  1. Feb 5, 2009 #1
    the problem is:

    To make a parallel plate capacitor, you have available two flat plates of aluminum (area = 190 cm2), a sheet of paper (thickness = 0.10 mm, κ = 3.5), a sheet of glass (thickness = 2.0 mm, κ. = 7.0), and a slab of paraffin (thickness = 10.0 mm, κ = 2.0). Find each's capacitance.

    my answers are:

    5.885E-7 farads for paper
    5.885E-8 farads for glass
    3.363E-9 farads for paraffin

    ...now the question asks to enter the largest capacitance possible, of the three, in nF and the smallest in pF...

    -smallest= 3363 pF (paraffin)
    -largest= 588.5 nF (paper)

    am i right with my values and just converting wrong or am i totally off... i converted all the values to meters before plugging them in to the equation below:

    *****here is the equation i am using*****

    (capacitance) = ((epsilon not)x(A)x(k)) / (d=thickness?)
  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