(Solution) - A positive charge is inside an isolated metal spherical shell -(2025 Original AI-Free Solution)

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A positive charge is inside an isolated metal spherical shell, as shown in Fig. 15.24. Describe the electric field in the following three regions: between the charge and the inside surface of the shell, inside the shell itself, and outside the outer shell surface. What is the sign of the charge on the two shell surfaces? How would your answers change if the charge were negative?