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Homework Help: Electric field from very long wire

  1. Feb 19, 2012 #1
    1. The problem statement, all variables and given/known data

    A very long straight wire has a charge of 1.5 * 10^-10 C/m. at what distance from the wire is the electric field magnitude equal to 2.5 N/C

    2. Relevant equations

    I was thinking about intergrating the electric field?

    3. The attempt at a solution

    the thing im having a problem with if i attempt to integrate the field is from which point to which point to integrate to? negative infinite to infinite? like usually i just do this with algebra and no number to solve for say to integrate the field from -a to a but in the end A is still in the equation.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Feb 20, 2012 #2

    SammyS

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    Do you know Gauss's Law ?
     
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