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A uniformly charged insulating rod of length 11.0 cm is bent into the shape of a semicircle as shown in the figure below. The rod has a total charge of -7.50 C.

 A uniformly charged insulating rod of length 11.0 cm is bent into the shape of a semicircle as shown in the figure below. The rod has a total charge of -7.50 C.

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 (a) Find the magnitude of the electric field CIn N/C) at O, the center of the semicircle.

 (b) Find the direction of the electric field at O, the center of the semicircle.

 (c) What if? What would be the magnitude of the electric field (in N/C) at O if the top half of the semicircle carried a total I charge of -7.50 uC and the bottom half, insulated from the top half, carried a total charge of +7.50 μc?

 (d) What would be the direction of the electric field at O if the top half of the semicirde carried a total charge of -7.50 pc and the bottom half, insulated from the top half, carried a total charge of +7.50 μc?

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A uniformly charged insulating rod of length 11.0 cm is bent into the shape of a semicircle as shown in the figure below. The rod has a total charge of -7.50 C.
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