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A hollow non-conducting spherical shell has inner radius R- 8cm and outer radius R2- 15 cm

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A hollow non-conducting spherical shell has inner radius R- 8cm and outer radius R2- 15 cm. A charge 0-45 nC lies at the center of the shell. The shell carries a spherically symmetric charge density ρ-Ar for R??R2 that increases linearly with radius, where A-29 μCm4. Stheexpertta.com (a) Write an equation for the radial electric field in the regionR in terms of Q.r, and Coulomb's constant k. You may take the positive direction as outward. Expression Er