Question: Figure a shows a circular disk that is uniformly charged. The central z axis is perpendicular to the disk face, with the origin at the

Figure a shows a circular disk that is uniformly charged. The central z axis is perpendicular to the disk face, with the origin at the disk. Figure b gives the magnitude of the electric field along that axis in terms of the maximum magnitude Em at the disk surface. The z axis scale is set by zs = 8.0 cm. What is the radius of thedisk?

0.5E z (cm)

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