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!

Voltage drop across a wire

  1. Mar 22, 2009 #1
    Compute the voltage drop along a 25 m length of household no. 14 copper wire (used in 15A circuits). The wire has diameter 1.628 mm and carries a 15 A current.


    Vdrop=I*R

    R=rho(L/A)




    I just plugged the resistivity of copper wire which is 1.72*10^-8, length, and area in to find the resistance. Which is .206 and then I found the voltage drop of 3.09v which was wrong what did i do wrong?
     
  2. jcsd
  3. Mar 22, 2009 #2

    LowlyPion

    User Avatar
    Homework Helper

    Perhaps you should show your calculation?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Similar Discussions: Voltage drop across a wire
  1. Voltage across a wire (Replies: 4)

Loading...