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 Im 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.