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Question about resistance in a circuit

  1. Mar 29, 2008 #1
    [tex]R = \rho \frac{\ell}{A}[/tex]
    When calculating resistance in a circuit and lets say there are no resistors in the circuit, does [tex]\ell[/tex] represent the length of the entire circuit (e.g. the length of the entire wire) or only the length across the battery?
  2. jcsd
  3. Mar 29, 2008 #2
    it should be the length of entire wire
  4. Mar 30, 2008 #3
    yes, l - length of the entire wire.
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