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Resistivity of a wire that is wound close on a cylinder

  1. Aug 10, 2017 #1
    1. The problem statement, all variables and given/known data

    20793725_1771973616149698_645562293_o.jpg
    2. Relevant equations
    R= pl/A
    effective resistance= 1/R
    3. The attempt at a solution
    I'm honestly dont know where to start, althought I know i need to do something with the 200 coils first, but I have no idea what should be done with it
     
  2. jcsd
  3. Aug 10, 2017 #2

    cnh1995

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    Homework Helper

    You can start with a diagram. It is mandatory here to show some efforts on your own.
     
  4. Aug 10, 2017 #3
    I think it's should look like this, with the wire wound closely together( please excuse my horrible drawing).
    20750448_1772001139480279_1032064015_n.png
     
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