Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Current flows through the block of metal

  1. Feb 23, 2010 #1
    1. The problem statement, all variables and given/known data

    Consider a rectangular block of metal of height A, width B, and length C, as shown in the figure below. If a potential difference V is maintained between the two A B faces of the block, a current IAB is observed to flow. Find the current that flows if the same potential difference V is applied between the two B C faces of the block. Give your answer in terms of IAB. (Use Iab for IAB, and A, B, and C, as necessary.)

    http://www.webassign.net/walker/21-27.gif

    2. Relevant equations



    3. The attempt at a solution

    I= Iab/Ibc
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Feb 23, 2010 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Hi court2011! :smile:

    Hint: resistivity :wink:
     
  4. Feb 23, 2010 #3
    Re: currents

    so it'll be I= pi a(b^2)/c?
     
  5. Feb 23, 2010 #4

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    (have a pi: π and a rho: ρ and try using the X2 tag just above the Reply box :smile:)

    Sorry, not following you :redface:

    what is? and why? :confused:
     
  6. Feb 23, 2010 #5
    Re: currents

    would the equation be (3.14)(a)(b2)/c
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook