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Gauss's law ?

  1. Jan 28, 2009 #1


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    Hi there,

    I have a question for you guys. It might sound stupid, but I don't get the material; my teacher can't teach!!! and your help is very appreciated

    I am reading about Gauss's law where they come to the conclusion that flux=charge/Eo

    as in this link http://hyperphysics.phy-astr.gsu.edu/HBASE/electric/elesph.html

    my question is why won't the net electric field be zero since we can cancel the field lines?

    Thanks in advance
  2. jcsd
  3. Jan 28, 2009 #2


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    Staff: Mentor

    With what?
  4. Jan 28, 2009 #3

    Doc Al

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    Staff: Mentor

    Why won't the net electric field of what be zero? What field lines are canceling?

    (That link describes the field from a point charge.)
  5. Jan 28, 2009 #4


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    hi.. sorry I didn't mean to be unclear

    True ,, the link describes the field from a point charge so each field line has another field line that is in the opposite direction.. so why don't all the field lines cancel?
    I am sorry I don't know how to explain it better
  6. Jan 28, 2009 #5


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    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi eRa! Welcome to PF! :smile:
    Flux is through a surface

    all the field lines in the diagram are going the same way through that surface. :wink:
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