A solid conducting sphere has a charge - 2Q and is surrounded by a neutral concentric hollow conducting spherical shell of double the radius. The potential difference between the solid sphere and the shell is V. The shell is, now given a charge - 3 Q; the new potential difference between them will be :

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-V

0.5 V

-0.5 V

answer is A.

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Detailed Solution

Any charge given on the outer sphere will not change the potential difference.

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