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Regarding ' The Electric field inside a non conducting shell '

  1. Jun 1, 2014 #1
    1. The problem statement, all variables and given/known data
    There is a Uniformly charged Non conducting Spherical shell along with a point charge external to the shell . they make up an isolated system . Find the electric field inside the shell .


    2. Relevant equations



    3. The attempt at a solution Actually using superposition principle we obtain that the field is actually non zero . But in order to calculate the electric field inside the shell if i use gauss law by considering a gaussian surface inside the shell .... there will be no charge enclosed in it so by gauss law the flux is zero . since in that case ∫E.da = E∫da which is equal to zero . Since ∫da is non zero E must be zero .......
    I guess there is some fault with this but im unable to find it out . So plz can u help me .
    And thanks for sparing ur valuable time to read this .
     
    Last edited: Jun 1, 2014
  2. jcsd
  3. Jun 1, 2014 #2

    haruspex

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    That will not be true in general. Is anything known about the shape of the shell?
     
  4. Jun 1, 2014 #3
    Im sorry thats a spherical shell
    and i have edited my question .
     
    Last edited: Jun 1, 2014
  5. Jun 1, 2014 #4
    Hello Uday

    I think the problem lies in concluding that if the flux across the gaussian spherical surface is zero ,then the electric field is zero .

    What is your reasoning behind moving E out of the integral ∫E.ds ?
     
  6. Jun 1, 2014 #5
    Ya ..... thats ryt E isnt constant .....
     
  7. Jun 1, 2014 #6

    haruspex

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    OK, so forget the point charge for the moment. What field does a uniformly charged spherical shell generate inside itself?
    Hint: when considering a Gaussian shell placed concentrically inside it, think about the symmetry.
     
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