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Physics Electrostatics Level: High School

A solid metal sphere of radius 3.00m carries a total charge of -3.50 microC. What is the magnitude of the electric field at a distance from the sphere center of

(a) 0.15m

(b) 2.90m,

(c) 3.10m

(d) 6.00m ?

How would the answer differ if the sphere were (e) a thin shell , or (f) a solid nonconductor uniformly charged throughout ?