Question: A thin wire ring of radius r carries a charge q. Find the magnitude of the electric field strength on the axis of the ring

A thin wire ring of radius r carries a charge q. Find the magnitude of the electric field strength on the axis of the ring as a function of distance l from its centre. Investigate the obtained function at l >> r. Find the maximum strength magnitude and the corresponding distance l. Draw the approximate plot of the function E(l).

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