Three long conducting plates `A, B` and `C` having charges `+q, -2q`, and `+q` as shown in figure. Here plate `A` and `C` are fixed. If the switch `S` is closed. The middle plate `(B)` will start moving in

Three large conducting plates A, B and C having charges +q,-2q and +q as shown in fig. The gaps l_(1) and l_2 are small and gtl_(2) The plates A and C are fixed and B is free to move. Neglest gravity. If switch S is closed, the plate B will start moving towards

Force between two conducting large plates , with charges Q and Q/2 as shown in the figure, is (Area of each face of plate =A)

Force between two conducting large plates , with charges Q and Q/2 as shown in the figure, is (Area of each face of plate =A)

Three conducting concentric shell s A,B, and C of radius a,2a,3a are as shown in the figure.The charge on shell B is Q ..The switch S is closed.Then after closing the switch The charge on innermost shell is

Three conducting concentric shell s A,B, and C of radius a,2a,3a are as shown in the figure.The charge on shell B is Q ..The switch S is closed.Then after closing the switch The charge on outermost shell is

Three identical conducting plates are arranged as shown in figure and they are given charges as indicated.When switch S is closed,the amount of charge flown through the switch is

Three conducting concentric shell s A,B, and C of radius a,2a,3a are as shown in the figure.The charge on shell B is Q ..The switch S is closed.Then after closing the switch If sigma_(A),sigma_(B) and sigma_(C) are the surface charge densities on A,B and C respectively then sigma_(A):sigma(B):sigma(C) is

Three large identical conducting parallel plates carrying charge +Q , -Q, and +2Q , respectively, are placed as shown in figure. If E_A, E_b, and E_C refer to the magnitudes of the electric field at points A, B, and C, respectively. Then

Three large identical conducting parallel plates carrying charge +Q , -Q, and +2Q , respectively, are placed as shown in figure. If E_A, E_b, and E_C refer to the magnitudes of the electric field at points A, B, and C, respectively. Then