CALC A material of resistivity r is formed into a solid, truncated cone of height h...

CALC A material of resistivity r is formed into a solid, truncated cone of height h and radii r₁ and r₂ at either end (Fig. P25.59). (a) Calculate the resistance of the cone between the two flat end faces. (Hint: Imagine slicing the cone into very many thin disks, and calculate the resistance of one such disk.) (b) Show that your result agrees with Eq. (25.10) when r₁ = r₂.