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Consider three identical metal spheres ` A, B` and C. Spheres A carres charge ` + 6q` carries no charge . Spheres A and B are touchd together and them separated. Sphere C is then touched to sphere `A` and separated from it . Finally the sphere `C` is touched to sphere `B` and separated from it . Find the final chage on the sphere `C`.

Answer» Correct Answer - ` 1. 125 Q`
When sphere `A` and `B` are touched and seperated
`q_A = q _B = (+_ 6 Q - 3 q) /2`
`q-A = q _B = (3q)/2`
when sphere `A` and `C` are toched and seperated
`q_A =q_C = (3 Q //2 +0)/2 = (3q)/4`
Now `B` and `C` are touched and seperated
`q_B =q_C = (3 q// 2 + 3 q //4)/2 = (9q)/8 = 1.12q`.


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