A solid insulating sphere of radius 0.07 m carries a total charge of 25 µC. Concentric with this sphere is a conducting spherical shell of inner radius 0.12 m and outer radius of 0.18 m and carrying a total charge of -54 µC. Find the magnitude of the electric field at the following distances from the center of the two spheres and shell:  (c) 0.10 m, (d) 0.15 m, and (e) 0.25 m

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3. A solid insulating sphere of radius 0.07 m carries a total charge of 25 µC. Concentric with this sphere is a conducting spherical shell of inner radius 0.12 m and outer radius of 0.18 m and carrying a total charge of -54 µC. Find the magnitude of the electric field at the following distances from the center of the two spheres and shell:  (c) 0.10 m, (d) 0.15 m, and (e) 0.25 m.

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