A solid, insulating sphere of radius a has a uniform charge density 1 and a total charge Q. Concentric with this sphere is an uncharged, conducting hollow sphere whose inner and outer radii are b and c, as shown in Figure P24.57.
(a) Find the magnitude of the electric field in the regions r c.
(b) Determine the induced charge per unit area on the inner and

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Insulator Conductor 2