A +10 nC charge is uniformly distributed over a spherical shell of radius r = 3 cm and a -5 nC charge is uniformly distributed over a spherical shell of radius r = 5 cm as shown. Use Gauss’s law to find the electric field ?D in the three regions: r < 3 cm; 3 < r < 5 cm; r > 5 cm. (Hints: By spherical symmetry, ?D will be radially-directed; the surface area of a sphere of radius r is S = 4??r^2.) ?s = +10 nC ?s = -5 nC
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For the region r < 3 cm: Since there is no charge within this region, the electric field D will be zero. Show more…
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