A solid conducting sphere of radius R = 10 cm has a charge Q = 20 nC . It is placed concentrically inside a thin, uncharged conducting spherical shell of inner radius 2 R and outer radius 3 R . If the

Question

A solid conducting sphere of radius R = 10 cm has a charge Q = 20 nC . It is placed concentrically inside a thin, uncharged conducting spherical shell of inner radius 2 R and outer radius 3 R . If the inner sphere is now connected to the outer shell by a conducting wire, what is the final charge (in nC) on the outer surface of the outer shell?

TestHub · Accepted Answer

Initially, the inner sphere has charge Q . When connected by a wire, the two conductors form a single equipotential body. Since charge resides on the outer surface of a conductor, all the charge Q will flow from the inner sphere to the outer surface of the outer shell. Therefore, the final charge on the outer surface of the outer shell is Q = 20 nC .

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