Hi , I have this problem but I cannot figure out the last question. A coaxial cable has an inner radius of a and an outer radius of b. between the two conductors is a material with conductivity σ. 1-Determine the resistance between the two conductors for a one meter length of cable. R=1/(σ*pi*(b^2-a^2)) 2- What would be the conductance G be? G=σ*pi*(b^2-a^2) 3- What would be the conductance be for a 100 [m] length cable? G=σ*pi*(b^2-a^2))/100 4-Explain why the cable is characterized by a conductance per unit of length (not a resistance per unit of length) I have no sure answer for it. I would say to avoid to have infinite resistance if a tends to b!!?? Please can someone help me with this question?