A spherical shell of radius 15cm carries 48uc distributed, Ask an Expert

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A spherical shell of radius 15cm carries 4.8uC , distributed uniformly over its surface. At the center of the shell is a point charge.

(A) If the electric field at the surface of the sphere is 750kN/c and points outward, what is the charge of the point charge?

(B) What is the field just inside the shell?

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