Twelve identical point charges q are equally spaced around the
circumference of a circle of radius R. The circle is centered at
the origin. One of the twelve charges, which happens to be on
the positive x axis, is now moved to the center of the circle.
Find the magnitude of the net electric force exerted on this
charge. Express your answer in terms of some or all of the
variables q, R, and appropriate constants.  Want an answer?  No
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