Questions
A very large sphere having charge 100e (e is equal to the charge of electron) uniformly distributed on the surface is compressed slowly and uniformly till its radius reduces to 1 m. The work done by the electric forces in this process is: (in J)
detailed solution
Correct option is D
work done = Ui−UfUi=0 as sphere very large no electrostatic interactionUf=self energy of sphere = Q28πε0R=9×109×100e221=4.5×1013×e2Talk to our academic expert!
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Three point charges of equal value q are placed at the vertices of al equilateral triangle. The resulting lines of force should be sketch as in
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