Compute for the work done, in millijoules, in moving a 6-nC charge radially away from the center from a distance of 6 m to a distance of 12 m against the electric field inside a non-conducting spherical shell of inner radius 4 m, outer radius 18 m, and total charge 7 mC.
Compute for the work done, in millijoules, in moving a 6-nC charge radially away from the center from a distance of 6 m to a distance of 12 m against the electric field inside a non-
answer: -3.1893 mJ
Consider two concentric conducting spherical shells of negligible thickness separated by vacuum. One of the shells has a radius of 4 m, while the other has radius of 8 m. The total charge of one of the shells is 7 mC, while that of the other is 8 mC. Their respective total charges are distributed evenly on their surfaces. Determine the total potential energy, in nanojoules, stored between the two shells. Use the permittivity of free space as 8.854 × 10-12 F/m.
ans: -27.5250
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