Asked by Star
                a metal ball of radius R is placed concentrically inside a hollow metal sphere of inner radius 2R & outer radius 3R. The ballis given a charge +2Q and the hollow sphere a total charge -Q. Calculate. electrostatic potential energy of system.???
            
            
        Answers
                    Answered by
            bobpursley
            
    U=k 2Q*Q/R^2  Am I missing something here?
    
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