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Charges on Conductors

two identical...

Question

two identical conducting spheres A and B are separated by a distance greater than their diameters the spheres carry equal charges and electrostatic force between them is F a third identical uncharged sphere C is first brought in contact with A, then with B and finally removed as a result, the electrostatic force between A and B becomes

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Solution

Dear student
C touched first A .By touching it took away half of the charge and then after touching B it took the 1/4th of the total charge .
A will be reduced to 3/4th and B become half.
The total charge it took is 3F/8

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