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[" 25.Figure shows a system of three con...

[" 25.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 siven a charge Q.Now if shell "C" is connected to shell "],[" A,then find the final charge on the shell "B" ."],[qquad ((del)/(del a))(del)/(del)],[" Ans."-(8Q)/(11)]

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