A point charge is placed at the center of a net uncharged spherical conducting shell of inner radius 2.5 cm and outer radius 4.0 cm. As a result, the outer surface of the shell acquires a surface charge density σ = 71nC/cm2. Find (a) the value of the point charge, and (b) the surface charge density on the inner wall of the shell. Q = σA
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Surface area of a sphere is 4 pi r^2.
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2 answers