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Homework Help: Resistors and Associated Length

  1. Mar 22, 2010 #1
    Questions: A certain copper wire has a resistance of 10.0 Ω. At what fraction of the length L must the wire be cut so that the resistance of one piece is 5.0 times the resistance of the other?

    What is the resistance of the longer piece? Shorter piece?

    I am completely lost on this. i know it should be fairly simple and I think I have to use the equation R= p*l/A
  2. jcsd
  3. Mar 23, 2010 #2


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    Resistance is proportional to length, so you just need one piece to be 5 times the length of the other.
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