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Homework Help: Calculate resistance from resitivity

  1. Apr 15, 2015 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations
    R = pL/A

    3. The attempt at a solution

    R(a) = 2x10^-4(0.15)/[pi(0.0005/2)^2] = 152.789 [Ohms]

    It is slightly off. Is there a subtle point that I've missed?

    Thank you very much.
    Last edited: Apr 15, 2015
  2. jcsd
  3. Apr 15, 2015 #2


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    2017 Award

    No, except that when they give you the resistivity and the diameter in 1 digit accuracy each, you cannot return a resistance with 6 digits precision. Because the first digit is a 1, you return two digits. That means 1.5 x 102, but 150 is acceptable generally.
  4. Apr 15, 2015 #3
    I see, thank you very much.
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