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: Resistance of a disk

  1. Apr 3, 2007 #1
    1. The problem statement, all variables and given/known data
    A disk with width b and radius a.
    An element of resistance is:

    [tex]dR=\rho \frac{2\pi r}{bdr}[/tex]

    How do I integrate this?

    Thanks in advance. :approve:

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Apr 3, 2007 #2


    User Avatar

    Staff: Mentor

    I don't understand your volume element. You are trying to get the total resistance between what two places? A point on one edge of the disk to a point on the other side, or from the center out to the perimiter, or what?
  4. Apr 3, 2007 #3
    It's the sum of the resistances of each ring of the disk.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Similar Threads for Resistance disk
Rocket subject to linear resistive force -- two methods