Questions
An isolated copper sphere is charged and the electrostatic energy stored in it is 16µJ. An internal agent supplies some charge in the sphere so that its charge becomes doubled, then work done by the external agent is
detailed solution
Correct option is C
If initial charge on the sphere is Q, then Ui=Q22×4π∈oR where R = radius.Now, Uf=(2Q)22×4π∈oR=4Ui∴W=Uf-Ui=4Ui-Ui=3Ui=3×16 μJ=48 μJTalk to our academic expert!
Similar Questions
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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