A point charge q is located at the center of a spherical shell of radius a that has a charge -q uniformly distributed on its surface. Find the electric field for the following points: (a) for all points outside the spherical shell a. E = q/4?r2 b. E = kq2/r2    c. none of these d. E = kq/r2 e. E = 0 (b) for a point inside the shell a distance r from the center a. E = 0 b. none of these     c. E = q/4?r2 d. E = kq/r2 e. E = kq2/r2

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.