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A charged rod is curved so that it is part of a circle of radius R (see figure below). The excess positive charge Q is
uniformly distributed on the rod. Find an expression for the electric field at point A in the plane of the curved rod in
terms of the parameters given in the figure. (Use any variable or symbol stated above along with the following as
necessary: k and ø.)
magnitude
E =
direction
-Select---
R
|A

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