Question: A spherical shell 30 cm in diameter carries 85 C distributed uniformly over its surface. A 1.0C point charge is located at the shells center.

A spherical shell 30 cm in diameter carries 85 μC distributed uniformly over its surface. A 1.0μC point charge is located at the shell’s center. Find the electric field strength
(a) 5.0 cm from the center
(b) 45 cm from the center.
(c) How would your answers change if the charge on the shell were doubled?

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