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A spherical, non-conducting shell of inner radius r1 = 7 cm and outer radius r2= 16...

A spherical, non-conducting shell of inner radius r1 = 7 cm and outer radius r2= 16 cm carries a total charge Q = 18 nC distributed uniformly throughout the volume of the shell. What is the magnitude of the electric field at a distance r = 11 cm from the center of the shell? (k = 1/4πε0 = 8.99 × 109 N.m2/C2)

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