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Homework Help: Electromagnetism - Conducting Spheres and their potential

  1. Feb 5, 2007 #1
    1. The problem statement, all variables and given/known data

    Two hollow concentric conducting spheres hold charges Q[1] and Q[2] as shown in the attachment.

    Find the potential of each sphere, and the potential difference.

    2. Relevant equations

    Potential difference V = Phi[2] - Phi[1]

    3. The attempt at a solution

    I'm having some trouble with the actual question; what does it mean, the potential of each sphere? Does this mean the potential of the sphere at a distance r where r is greater than the radius? In this case I think the answer would be

    Phi[1] = Q[1]/(4*Pi*Epsilon*r)


    Phi[2] = Q[2]/(4*Pi*Epsilon*r)

    I don't think this is quite correct however. Does it mean the potential *on* each sphere instead? In this case, wouldn't the potential on the inner sphere due to the bigger sphere be zero?

    I'm quite confused here and any help would be appreciated!

    Attached Files:

    • pf.jpg
      File size:
      6.1 KB
  2. jcsd
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