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Homework Help: Resistance Through a Hollow Cylinder

  1. Mar 8, 2010 #1
    A hollow cylinder is .012 m long and has an inner radius of 0.005 m and an outer radius of .0175 m. Treat each surface (inner, outer, and the two end faces) as an equipotential surface.

    Resistivity of material making the cylinder = 9.68 x 10^-8 Ohm*m

    1. At room temperature, what will an ohmmeter read if it is connected between the inner and outer surfaces?

    2. Relevant equations

    R=rho/(2pi*L) (ln (b/a))

    3. The attempt at a solution
    My professor worked this problem out and got 851 Ohms but I cannot figure out how.

    Any help is greatly appreciated.
  2. jcsd
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