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11. A point charge Q is located at the origin. Find f£ -di (actually do the integral) around (a) a circle of radius a centered on the origin. (b) a square of side a centered on the origin. 12. Repeat the previous problem if the point charge is located at y 2a, 0 but the paths of integration remain the same.

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Sololion γα do d o 28ca очтがSirce Souar 8 a12 dx J2-a12 ·2四 였。

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