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 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 § = 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? (a) B (10° N.m²/C) e 0 s -20, (b)

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 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 § = 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? (a) B (10° N.m²/C) e 0 s -20, (b)