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Field pattern -- Which can be produced by 2 point charges?

  1. Aug 2, 2017 #1
    1. The problem statement, all variables and given/known data

    Screen Shot 2017-08-02 at 9.11.35 pm.png
    2. Relevant equations


    3. The attempt at a solution
    why not B?
     
  2. jcsd
  3. Aug 2, 2017 #2

    Merlin3189

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    Gold Member

    Where do electric field lines start and end?
     
  4. Aug 2, 2017 #3
    from positive to negative.
     
  5. Aug 2, 2017 #4

    Merlin3189

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    Gold Member

    So if you have two charges, where would they be in B?
     
  6. Aug 2, 2017 #5
    ummm... no, it can't be B.
     
  7. Aug 2, 2017 #6

    Merlin3189

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    Gold Member

    You could try drawing two point charges and sketch some electric field lines.
    None of the pictures is perfect, but see which one looks a bit like your sketch (or rather, two sketches, because ...)
     
  8. Aug 2, 2017 #7
    Yes, thank you~
     
  9. Aug 2, 2017 #8

    berkeman

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    Staff: Mentor

    Are you sure the problem is asking about Electric fields? I get a different answer if they are talking about magnetic fields... :smile:
     
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