1. What is the conductance of device consisting of two concentric metalshells, the inner one having a radius of 20 cm, and the outer one having a radiusof 40 cm, when the volume between the two shells is filled with tap water havinga conductivity of 200 µS/m? (a) For al volt difference between the two shells,what is the electrical current? (b) What is the current density J at a radiusslightly greater than 20 cm? What is the current density at a radius just shy of40 cm?

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Answered: 1. What is the conductance of device…

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Subject: phy