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!

Resistance problem

  1. Oct 10, 2004 #1
    9 copper wires of length L and diameter d are connected in parallel to form a single composite conductor of resistance R. What must be the diameter of a single copper wire of length L if it is to the the same resistance?

    obviously since copper is the only thing involved i know the resistivity is the same given the same distance

    R=(resistivity)L/(Area)....i believe this formula may help me...not sure
  2. jcsd
  3. Oct 11, 2004 #2
    For parallel combination, [tex]\frac{1}{R_{eq}} = \sum \frac{1}{R_{i}}[/tex] where [tex]R_{i} = \rho \frac{L}{A}[/tex]. Express A as a function of diameter.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Resistance problem
  1. Resistivity Problem (Replies: 8)

  2. Resistance problem (Replies: 1)