1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Maximum current and Electric field in wire

  1. Mar 10, 2009 #1
    Please someone help me, i posted here before and got no reply :(

    How do you find the maximum current and the largest electric field in the wire for the bottom question?

    Two 10-cm-diameter metal plates are 1.0 cm apart. They are charged to +/-12.5 nC. They are suddenly connected together by a 0.224-mm-diameter copper wire stretched taut from the center of one plate to the center of the other.
  2. jcsd
  3. Mar 10, 2009 #2
    B = [tex]\mu[/tex]oI[tex]/[/tex]2[tex]\pi[/tex]r

    B is magnetic field, I is current, r is radius of the magnetic field(i think), and [tex]\mu[/tex]0 is equal to 4[tex]\pi[/tex] x 10-7

    Those pi's aren't superscripted, it is just being difficult.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook