A positively charged particle is held at the center of a spherical shell. The figure gives the magnitude E of the electric field versus radial distance r. The scale of the vertical axis is set by E,= 15.0 x 107 N/C. Approximately, what is the net charge on the shell? Assume r,= 2 cm. Number (0/0) E 2r, r (cm) Units 3r, 4T, 51,
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