1. Mar 29, 2008 #1

   skwz

   

   Since:
   [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?

    

   skwz, Mar 29, 2008
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3. Mar 29, 2008 #2

   wudingbin

   

   it should be the length of entire wire

    

   wudingbin, Mar 29, 2008
4. Mar 30, 2008 #3

   KnowPhysics

   

   yes, l - length of the entire wire.

    

   KnowPhysics, Mar 30, 2008

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