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Q. Two parallel plates, each with an area of 100 cm^2 , are given equal and opposite charges of magnitude 0.180 uC . The space between the plates is filled with a dielectric material, and the electric field within the dielectric is 0.310 MV/m

Q. Consider a uniformly charged ring in the xy plane, centered at the origin. The ring has radius a and positive charge q distributed evenly along its circumference.

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