1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Finding Length and Diameter Of A Wire

  1. Mar 14, 2013 #1
    1. The problem statement, all variables and given/known data
    Suppose you wish to fabricate a uniform wire from 2.00 g of copper. The wire is to have a resistance of* R = 0.480 Ω*and all the copper is to be used.


    2. Relevant equations



    3. The attempt at a solution

    In the problem, they suggest using this relationship for resistance [itex]R=\rho A l[/itex]. How did they get that? From my understanding, resistance is [itex]R = \rho \frac{l}{A}[/itex]
     
  2. jcsd
  3. Mar 14, 2013 #2

    ehild

    User Avatar
    Homework Helper
    Gold Member

    You are right, R=ρL/A.

    ehild
     
  4. Mar 14, 2013 #3
    The mass is [itex]M=Ald[/itex], where d is the density.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Finding Length and Diameter Of A Wire
Loading...