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In the figure below, a solid sphere, of radius a = 1.20 cm is concentric with a spherical conducting shell of inner radius b = 2.00a and outer radius c = 2.40a. The sphere has a net charge q₁ = +3.00 fC which is distributed uniformly through the sphere; the shell has a net charge of 92 = -91. a (a) What is the magnitude of the electric field at radial distance r = 0? N/C (b) What is the magnitude of the electric field at radial distance r = a/2? N/C (c) What is the magnitude of the electric field at radial distance r = a? N/C (d) What is the magnitude of the electric field at radial distance r = 1.50a? N/C (e) What is the magnitude of the electric field at radial distance r = 2.10a? N/C (f) What is the magnitude of the electric field at radial distance r = 3.60a? N/C (g) What is the net charge on the inner surface of the shell? fc (h) What is the net charge on the outer surface of the shell? fc