Interesting question about electrostatic induction

[umciukas]

A conductive plate with no initial charge is put between two identical positevily charged plates. Is it possible that the plate which is put between those two plates configures a situation where the net force acting upon each plate is zero? (the third plate could have different dimensions then the two positevily charged plates)

As far as I can figure, the E field between those two plates is zero so no charge in the third plate can be induced and the putting of the third plate wouldn't change anything.

 

[timthereaper]

I think the positively charged plates would pull the electrons on the middle plate toward the surface of the plate. The (very rough) schematic would look something like this:

|+ -|- +|

 

[Meir Achuz]

But the plate is uncharged. Where would the electrons come from.
There can be no charge inside the conductor.
Nothing would happen.

 

[timthereaper]

Right. Gotcha. Forgot about that whole no charge in the conductor thing.