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Finding the electric field at a given point

  • #1

Homework Statement



I have a sphere with two thin concentric shells with radii R2 and R3 with charges q1 and q2. I am trying to find the formulas for find the electric field for A and B.

The Attempt at a Solution



I found C to be E = k * (q1+q2)/c^2 but I cannot seem to figure out the correct formulas for A and B. Here is a picture of the sphere http://imgur.com/cWS8r5G
 

Answers and Replies

  • #2
vanhees71
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Think about the symmetry of the problem and then use Gauss's Law!
 

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