In the arrangement of two concentric conducting shell as shown in the figure, charge on the oute...

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In the arrangement of two concentric conducting shell as shown in the figure, charge on the outer shell is \( 10 \mu \mathrm{C} \) and the inner shell is grounded. Then the charge q' on the inner shell is:-
(1) Zero
(2) \( q^{\prime}=-10 \mu C \)
(3) \( q^{\prime}=20 \mu \mathrm{C} \)
(4) \( q^{\prime}=-5 \mu \mathrm{C} \)
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