Question: 1- A charged disk with surface charge density +o is shaped into an annulus of inner radius R and outer radius 2R as shown

1- A charged disk with surface charge density +o is shaped into

1- A charged disk with surface charge density +o is shaped into an annulus of inner radius R and outer radius 2R as shown in the figure. Find the electric potential at the center (point O.). to 2R R.

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