Figure shows a system of three concentric metal shells A, B and C with radii a, 2a and 3a respec...

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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
\( P \) final charge on the shell \( \mathrm{B} \), is equal to :

W.
(A) \( -\frac{4 Q}{13} \)
(B) \( -\frac{8 Q}{11} \)
(C) \( -\frac{5 Q}{3} \)
(D) \( -\frac{3 Q}{7} \)
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