Determine the potential difference between the points

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Consider a ring of radius R with the total charge Q spread uniformly over its perimeter. What is the potential difference between the point at the center of the ring and a point on its axis a distance 2R from the center? How many electrons should be removed from an initially uncharged spherical conductor of radius .300m to produce a potential of 7.5kv at the surface?

Reference no: EM13289506

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