Chapter 22, Problem 030 SN The figure shows two concentric rings, of radii Rs and RL, that lie on the same plane. Point P lies on the central z axis, at distance D from the center of the rings. The smaller ring has uniformly distributed charge Qs. What is the uniformly distributed charge on the larger ring if the net electric field at P is zero? State your answer in terms of the given variables. P R. %3D
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