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A circular ring of charge, with radius R,is placed in the xy-plane and centered on the...

A circular ring of charge, with radius R,is placed in the xy-plane and centered on the origin. The linear charge density of the ring isλ=λ_o*cos^2(φ), where φ is the cylindrical polar coordinate such that any point in space is indicated by (r, φ, z). Find the electric potential anywhere on the z-axis as a function of z . Using this electric potential find the electric field anywhere on the z-axis also as a function of z

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