dq A thin uniformly charged arc with radius R = 2 cm is shown in the figure below. The total charge of the arc is Q 81 µC. Point Ois the origin at the center of the arc. R Calculate the linear charge density 2. Write down an (a) expression for the infinitesimal charge dq. (b) Write down the potential dV at point O due to the infinitesimal charge dq.

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