A circular pan of radius b has a plastic bottom and metallic sidewall of height h. It?s filled with a solution of resistivity r. A metal disk of radius a and height h is at the center, as shown in Fig. 24.19. The side and disk are essentially perfect conductors. Show that the resistance measured from side to disk is R = ??ln(b/a)2?h.

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h FIGURE 24.19 Problem 67