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Dipole moment confusion

  1. Jan 5, 2016 #1
    Dipole moment is the measure of strength of electric dipole and is equal to product of either charge and distance between two charges.
    P=ql
    but as we know when charges are close the force b/w them is strong n when they are far away force decrease.
    But in above equation strength increases with increase in distance as p is directly proportional to l.
    Where have i got it wrong?
     
  2. jcsd
  3. Jan 5, 2016 #2

    haruspex

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    Those are two different things. The attraction between them diminishes if they are far apart, but that is not the dipole moment.
    There is an analogous situation with masses and gravity. If two masses orbit each other, the attraction between them is weaker when they are far apart, but their angular momentum increases.
     
  4. Jan 5, 2016 #3
    What do we mean by strength of dipole?
     
  5. Jan 6, 2016 #4

    haruspex

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    I'm not sure it is right to speak of the dipole having a strength. A dipole has a moment, and the moment has a strength. But the dipole also has a field and a potential.
     
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