Interesting question about electrostatic induction

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Discussion Overview

The discussion revolves around the concept of electrostatic induction, specifically examining the effects of placing a conductive plate between two positively charged plates. Participants explore whether this configuration can result in a net force of zero on the plates and the implications of charge distribution within the conductive plate.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions if the conductive plate can create a situation where the net force on each plate is zero, suggesting that the electric field between the charged plates is zero and thus no charge would be induced on the third plate.
  • Another participant proposes that the positively charged plates would attract electrons from the middle plate towards their surfaces, implying that charge distribution could occur despite the plate being initially uncharged.
  • A third participant counters this by stating that since the middle plate is uncharged, there would be no electrons available to be attracted, leading to the conclusion that nothing would happen.
  • A later reply acknowledges the oversight regarding the absence of charge within the conductor, reinforcing the idea that the conductive plate cannot influence the system as initially suggested.

Areas of Agreement / Disagreement

Participants express disagreement regarding the effects of the conductive plate on the system, with some suggesting charge movement and others asserting that no change occurs due to the lack of initial charge in the plate.

Contextual Notes

The discussion highlights assumptions about charge distribution and the behavior of conductors in electrostatic fields, with some participants not fully considering the implications of charge neutrality in conductors.

umciukas
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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.
 
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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:

|+ -|- +|
 
But the plate is uncharged. Where would the electrons come from.
There can be no charge inside the conductor.
Nothing would happen.
 
Right. Gotcha. Forgot about that whole no charge in the conductor thing.
 

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