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Homework Help: Two thin conducting spheres

  1. Mar 5, 2008 #1
    1. The problem statement, all variables and given/known data
    two thin conducting spheres, one inside the other. They are both centered about the same point. The outer sphere has a total charge Q and radius R2 and the inner sphere has a total charge -Q and radius R1.

    The magnitude of the charges is Q = 500 nC, and the radii are R1 = 0.5 cm and R2 = 5.5 cm.

    How much energy would you need to expend to move one electron from the outer sphere to the inner sphere?


    2. Relevant equations
    W=kQ(-e)(1/R1- 1/R2)

    3. The attempt at a solution
    W=kQ(-e)(1/R1- 1/R2)= 130.9
     
  2. jcsd
  3. Mar 6, 2008 #2

    Shooting Star

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    Your approach is correct.
     
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