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Homework Help: Electric field formula problem

  1. Jan 26, 2012 #1
    An electric field of magnitude E is measured at a distance R from a point charge Q. If the charge is doubled to 2Q and the electric field is now measured at a distance of 2R from the charge, the new measured value of the field will be?

    ATTEMPT: using the forumla E=(k)(q/r^2) i think the answer is E/2. is this right?
  2. jcsd
  3. Jan 26, 2012 #2


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    Staff: Mentor

    Looks good.
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