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!

Homework Help: Electric field of a wire

  1. Mar 16, 2010 #1
    So I'm learning about how applied electric field causes current in a wire.. I'm confused about one thing. If you have a wire connected to a battery.. and let's say for the first "half" of the circuit the wire is made of copper and the second half is the wire is made of gold... will the electric field be different in these two materials even if they have the same dimensions? Because that's the only way I can see the current staying the same.
     
  2. jcsd
  3. Mar 16, 2010 #2

    ehild

    User Avatar
    Homework Helper

    Yes. The current is the same, the resistance of the two pieces of wire are different, so both the voltage across them and the electric field inside them are different.

    ehild
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook