a total electric charge of 5.50 nc is distributed uniformly over the surface of a metal sphere with a radius of 30.0 cm . the potential is zero at a point at infinity.
a. find the value of potentital at 5.50 cm from the center of the sphere.
b. find the value of the potential at 30.0 cm from the center of the sphere.
c. find the value of the potential at 16.0 cm from the center of the sphere.

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