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Electric Field Mapping Lab

  1. Feb 11, 2012 #1
    1. The problem statement, all variables and given/known data

    Compute values for the electric field at four different points on the point-line plate. Comment on the validity of your values.

    2. Relevant equations

    E = F/q
    ΔV = ∫E dot ds

    3. The attempt at a solution

    I have attached 3 electric field maps that I did in the lab and I also have a data table with voltage after the 7 resistors (E1 - E7). I just don't understand how I can calculate the electric field with what I have.
     

    Attached Files:

  2. jcsd
  3. Feb 12, 2012 #2

    Redbelly98

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    Let's look at this equation:
    As an approximation, suppose that E is constant between two consecutive equipotential lines. What does the integral become in that case?
     
  4. Feb 12, 2012 #3
    E∫ds = E*s...
     
  5. Feb 12, 2012 #4

    Redbelly98

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    ... = ΔV

    So to find E ... ?
     
  6. Feb 12, 2012 #5
    ΔV / Δs ?
    Δs should be in meters?
     
  7. Feb 12, 2012 #6

    Redbelly98

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  8. Feb 12, 2012 #7
    but where does the distance measurement start?
    from the point I want to know the electrical field at to where?
     
  9. Feb 13, 2012 #8

    Redbelly98

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    The distance is measured between two eqipotential lines, along the E-field line. You can take midway between the eqipotentials as the point where you are calculating E.
     
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