A charged particle is held at the center of two concentric conducting spherical shells. Figure (a) shows a cross section. Figure (b) gives the net flux O through a Gaussian sphere centered on the particle, as a function of the radius r of the sphere. The scale of the vertical axis is set by Os = 3.0 × 105 N-m²/C. What are (a) the charge of the central particle and the net charges of (b) shell A and (c) shell B? B -20, (a) (b) (a) Number i Units (b) Number i Units (c) Number i Units O (10° N. m2/C)
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