Coaxial resistors, coaxial capacitors and self-energy of charged sphere

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Ave Kar
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I have a couple of questions in E&M.

a)Can anyone tell me what a coaxial resistor and a coaxial capacitor looks like? (Approx Diagram) Because I am not sure which equations apply to them since I am not sure what they look like.
b)How do I find a self energy of a charged sphere? Split it into 2 parts and bring it together? Not sure on this one, if someone can help, thnx.
 

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b) Do you mean how do you measure (in the lab) the energy in a charged sphere?

Or do you mean how do you calculate the energy in a charged sphere?

There is a good discussion on calculating the energy of a charged sphere in Feynman Lectures Volume II chapter 8-1.

a) Just do a Google sreach for the coaxial caps and resistors. You can find the complete specs from most vendors.