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[" Figure shows a system of three concen...

[" Figure shows a system of three concentric metal "],[" shells "A,B" and "C" with radii "a,2a" and "3a],[" respectively.Shell "B" is earthed and shell "C" is given "],[" a charge "Q" .Now if shell "C" is connected to shell "],[A" ,then the final charge on the shell "B" is equal to "],[qquad sqrt(3a((sqrt(a))/(2a)A),(1)/(3))]

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