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Homework Help: Electric potential of a point

  1. Jun 20, 2011 #1
    1. The problem statement, all variables and given/known data

    Let there be an infinite plate of positive charge density σ. Let there also be an uncharged conducting slab of a thickness h, placed above and parallel to the plate.

    Without copying the question directly, I would like to know how one would calculate the electric potential for an arbitrary point C above the slab, at a distance c from the plate.

    2. Relevant equations

    V = kq/r, or 1/(4piε0)*(q/r)
    V(for a charge distribution) = 1/(4piε0)*integral(dq/r)

    If relevant, electric field between two conducting plates with surface charge densities +/- σ is E = σ/ε0.

    3. The attempt at a solution

    Apologies if anything below is incorrect.

    Given the positive charge density of the plate, the side of the slab closest to the plate will have a positive surface charge density and the side farthest from the plate will have a negative surface charge density. I am at a loss as to how the slab affects the potential at point C.

    In addition, I am not quite sure what the thickness of the slab has to do with this problem.
  2. jcsd
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