The figure shows a spherical shell with uniform volume charge density p = 1.86 nC/m3, inner radius a = 8.20 cm, and outer radius b = 3.5a. What is the magnitude of the electric field at radial distances (a) r = 0; (b) r = a/2.00, (c) r = a, (d) r = 1.50a, (e) r = b, and (f) r = 3.00b? %3D
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