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Homework Help: Question about Electric Field Strength and Electric Potential

  1. Apr 19, 2009 #1
    Lets say I have a point charge X placed on a region between a +Q test charge and +2Q point charge where electric field strength is zero. Since E=-dV/dR, does it mean V=0 or constant? Can the point charge move if i place it there? Well lets just ignore gravitational field/force here.
  2. jcsd
  3. Apr 19, 2009 #2

    Doc Al

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    Staff: Mentor

    No, V ≠ 0. But the rate of change of V with respect to R is zero. That means the potential is a minimum at that point.
    Why would it move? Is there a force on it?
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