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A plastic disk of radius R = 34.1 cm is charged on one side with a uniform surface charge density 9.65 fC/m², and then three quadrants
of the disk are removed. The remaining quadrant is shown in the figure. With V = 0 at infinity, what is the potential in volts due to the
remaining quadrant at point P, which is on the central axis of the original disk at distance D = 0.213 cm from the original center?
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