A sphere of 4cm radius is suspended with in a hollow sphere of 6cm radius. If the inner sphere is charged to a potential 3esu while the outer sphere is earthed, then the charge on the inner sphere will be

Options

(a) 1/4 esu
(b) 30 esu
(c) 36 esu
(d) 54 esu

Correct Answer:

36 esu

Explanation:

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