Question

A positive point charge (+Q) is located at the origin of a coordinate system. Centred on that origin and lying in the y-plane is a thin ring of charge of radius R and total charge (equally distributed) of -. What will be the net electric field at a point a distance d directly above the origin of the coordinate system? Enter your expression in terms of εο. Q. d and R. Use an asterisk *, to indicate multiplication. For example, 2 *f(z), a *z* (z+b) * (c*z + d). b * tan (a * θ) or e(oz) * b

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