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A nonconducting spherical shell of inner radius R1 and outer radius R2 contains a uniform volume charge density ρ throughout the shell.Use Gauss's law to derive an equation for the magnitude of the electric field at the following radial distances r from the center of the sphere.Your answers should be in terms of ρ,R1,R2,r,ε0,and π.
(a)r < R1
(b)R1 < r < R2
(c)r > R2
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