Question

A square metal plate of edge length 8.4 cm and negligible thickness has a total charge of 8.2 x…

A square metal plate of edge length 8.4 cm and negligible thickness has a total charge of 8.2 x 10-6 C. (a) Estimate the magnitudeE of the electric field just off the center of the plate (at, say, a distance of 0.60 mm from the center) by assuming that the charge is spread uniformlyover the two faces of the plate. (b) Estimate E at a distance of 34 m (large relative to the plate size) by assuming that the plate is apoint charge. Give your answers in N/C.

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