Answered: QUESTION 3 A circular ring of charge… | bartleby

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QUESTION 3
A circular ring of charge with radius 2 m lies in the 2 = 0 plane, with center at the origin. If the
uniform charge density is Pe = 10nC/m, find the point charge & at the origin which would produce
the same electric field Ễ at (0, 0, 5) m.

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Could you please explain, why the electric field will be along - direction?