Consider a solid conducting sphere and a concentric conductingspherical shell ar

Question

Consider a solid conducting sphere and a concentric conductingspherical shell around it. The spherical shell has a charge -7Q.The solid sphere has a charge of +2Q. (a) How much charge is on theouter surgace and how much charge is on the inner surface of thespherical shell? (b) Suppose a metal wire is now connected betweenthe solid sphere and the shell. After electrostatic equilibrium isreestablished, how much charge is on the solid sphere and on eachsurface of the spherical shell? Does the electric field at thesurface of the solid sphere change when the wire is connected? Ifso, in what way? (c) Suppose we return to the conditions in part(a). We then connect the solid sphere to ground with a metal wire,and then disconnect it. Then how much total charge is on the solidsphere and on each surface of the spherical shell?

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