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Resistivity and Resistance

  1. Jun 1, 2013 #1
    1. The problem statement, all variables and given/known data



    2. Relevant equations
    R=pL/A


    3. The attempt at a solution

    The answer is C and I don't know why. If R = pL/A then isn't L=b between X and Y?
     

    Attached Files:

  2. jcsd
  3. Jun 1, 2013 #2
    There are 2 wires running from X to Y. These wires are in parallel. One is of length 2b, and the other is of length b. You need to find the overall resistance of these two resistors in parallel.

    I don't think that this problem is stated very well. I think it should state outright that there are two resistances in parallel.
     
  4. Jun 1, 2013 #3
    that makes sense. thank you
     
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