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Homework Help: Coulomb's Law

  1. Jun 1, 2008 #1
    1. The problem statement, all variables and given/known data
    The magnitude of electrical force between a pair of charged particles is _____ as much when the particles are moved half as far apart.

    2. Relevant equations

    3. The attempt at a solution

    I understand that Coulomb's Law is.

    F = k q1 q2 / d^2

    So is the answer just putting in the distance which is 1/2 and squaring it? So is it just 1/2^2?
  2. jcsd
  3. Jun 1, 2008 #2


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    Homework Helper

    Be careful -- the distance between particles appears in the denominator of Coulomb's Law. So if the distance is halved, what happens to this ratio?
  4. Jun 1, 2008 #3
    If the distance distance is halved then the ratio would increase... I just don't know by how much...
  5. Jun 1, 2008 #4
    Will the force increase or decrease? and by what factor? Hint: What is [tex](\frac{1}{2})^2[/tex]?
  6. Jun 1, 2008 #5


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    Homework Helper

    I think you mean [tex]\frac{1}{(\frac{1}{2})^2}[/tex] ; the halved distance is in the denominator for Coulomb's Law...
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