1. Limited time only! Sign up for a free 30min personal 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!

Rank the resistances

  1. Oct 4, 2009 #1
    1. The problem statement, all variables and given/known data
    The figure below shows cross sections through three long square conductors of the same length and material, with square cross sections of edge lengths as shown. Conductor B fits snugly within conductor A, and conductor C fits snugly within conductor B.

    Rank the following according to their end-to-end resistances, greatest first: the individual conductors and the combinations of A + B (B inside A), B + C (C inside B), and A + B + C (B inside A inside C).

    http://img14.imageshack.us/img14/7955/phys2.jpg [Broken]

    2. Relevant equations

    R = p (L/A)

    3. The attempt at a solution
    Each of them have a different length and area, so I don't know how to go about this problem.
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Oct 4, 2009 #2


    User Avatar
    Homework Helper
    Gold Member

    You have a relevant equation and the dimensions of your conductors. That's all you need.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Rank the resistances
  1. Ranking task (Replies: 1)