Question: A square insulating sheet 80.0 cm on a side is held horizontally. The sheet has 7.50 nC of charge spread uniformly over its area (a)

A square insulating sheet 80.0 cm on a side is held horizontally. The sheet has 7.50 nC of charge spread uniformly over its area
(a) Calculate the electric field at a point 0.100 mm above the center of the sheet.
(b) Estimate the electric field at a point 100 m above the center of the sheet.
(c) Would the answers to parts (a) and (b) be different if the sheet were made of a conducting material? Why or why not?

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