The following diagram shows three metal balls Ball `A` is charged to `Q` coulombs and `B,C` are unchanged .The charges on balls `B,C` when the switches `S_(1)` and `S_(2)` are closed are respectively

When switch is closed , charges on C_(1) and C_(2) are

Three identical metallic plates, each of area A, are kept at small separations as shown. Initially, charge Q, 3Q and 3Q are given to the plates A, B and c, respectively. Now, both the switches S_(1) and S_(2) are closed simultaneously. Then Charge flown through S_(1) and S_(2) are

Three identical metallic plates, each of area A, are kept at small separations as shown. Initially, charge Q, 3Q and 3Q are given to the plates A, B and c, respectively. Now, both the switches S_(1) and S_(2) are closed simultaneously. Then Charge flown through S_(1) and S_(2) are

Find the charge flown when the switch S is closed.

In the given circuit, the initial charges on the capacitors are shown in the figure. The charge flown through the switches S_(1) and S_(2) respectively after closing the switches are

In the given circuit, the initial charges on the capacitors are shown in the figure. The charge flown through the switches S_(1) and S_(2) respectively after closing the switches are

Three concentric spherical conducting shells A, B and C of radii a, 2a and 4a are initially given charges +Q, -2Q and +Q respectively. The charge on the middle spherical shell B after switches S_(1) and S_(2) are simultaneously closed, will be