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Work and Equipotential Lines

  1. Feb 26, 2007 #1
    1. The problem statement, all variables and given/known data

    The work required to bring a negatively charged body from very far to either of the points indicated in the figure is greatest for point _____.


    a. point A

    b. point B

    c. point C

    d. point D

    e. point E

    2. Relevant equations

    U = q_0*V or W (a-b) = (q*q_0)/(4*pi*epsilon_0)*[(1/r_a) -(1/r_b)]

    3. The attempt at a solution

    The negatively charged particle is moving against the electric field. As indicated by the equipotential lines, the electric field is strongest near the positive charge, so the potential V is greatest near the positive charge. If V is greatest at E, then won't the work at this point be greatest? (Or did I reverse it since a negative charge is involved and q*q_0 is negative?)

  2. jcsd
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