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Capacitance of concentric shells

  1. May 30, 2009 #1

    kenneth1100

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    for the part of Capacitance of concentric shells

    why Va equals that?


    why the voltage on the surface of a is affected by -Q/(4pi*epsilon*b),
    which represents the voltage on the surface of b

    these two voltage represents something at different position!!
     
    kenneth1100, May 30, 2009
  2. jcsd
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  3. May 30, 2009 #2

    LowlyPion

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    Homework Helper

    LowlyPion, May 30, 2009
  4. May 31, 2009 #3

    kenneth1100

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    thank you
    i forgot that V in a shell/sphere is the same as if it's on the surface
    I thought the p.d. by the larger shell were different on the surface of the larger shell and on the surface on the smaller shell........
    that's why i got trouble

    anyway, thanks~
     
    kenneth1100, May 31, 2009
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