Question

A solid conducting sphere of radius a has a non-uniform volumetric charge density given bye()-r (where k is some constant). Assume the sphere is surrounded by a concentric conducting shell of radius b and that the space between the sphere and the shell is filled with a weakly conducting fluid of conductivity σ 1. Find an expression that represents the resistance between the sphere and the shell assuming they are maintained at a potential difference ΔV. If the fluid is a 10mM aqueous solution of KCl, the conductivity at 25°C is σ = 0.141 ohms! m-1. what is the resistance (in Ohms) if a = 0. 1 m and b = 0.15 m? a. b.

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