The figure shows two concentric rings, of radii R and R' = 2.54R, that lie on the same plane. Point P lies on the central zaxis, at distance D = 4.17R from the center of the rings. The smaller ring has uniformly distributed charge Q = 5.71 × 10-6 C. What is the uniformly distributed charge on the larger ring if the net electric field at P is zero?

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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.