Does metal powder in water disperse when water is being charged?

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Discussion Overview

The discussion revolves around whether metal powder in water disperses when the water is electrically charged. Participants explore the interactions between the charged water, the metal powder, and the electric field generated by a high-voltage source. The scope includes theoretical considerations and conceptual clarifications regarding electrostatics and fluid dynamics.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant suggests that metal powder may not disperse in charged water due to the repulsion of water molecules, leading to a net repulsion of zero.
  • Another participant questions the completeness of the scenario, asking about the presence of the other electric pole and the nature of the electric field due to the wire.
  • A participant describes the setup, indicating that the metal plate provides charge transfer to the metal powder and discusses the alignment of water molecules in an electric field.
  • One participant notes that if the metal powder grains become charged, they will repel each other due to like charges, and raises questions about the behavior of water molecules and the forces acting on the powder grains in the electric field.

Areas of Agreement / Disagreement

Participants express differing views on the behavior of the metal powder in charged water, with no consensus reached on whether it will disperse or remain intact. Multiple competing hypotheses regarding the interactions and effects of the electric field are presented.

Contextual Notes

Participants highlight several assumptions, such as the nature of electrical contact between components and the response of water to an electric field, which remain unresolved. The discussion also depends on the specifics of the experimental setup and the definitions of terms used.

kevin_tee
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Does metal powder in water disperse when water is being electrically charged? I think that it might not disperse since water is also charged, the repulsion of water molecule will force it back making net repulsion equal to zero. Am I correct? Thanks for answering.

Here is the diagram that I drawn in the case that it disperse.
 

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I don't think the picture is complete - where is the other electric pole?
Perhaps the grey wire is attached to a Van der Graaf generator?

What would be the electric field due to the wire?
Is there electrical contact between the powder and the rod - so the powder becomes charged too?
Is there electrical contact between the wire and the water?
How does water respond to an electric field?
 
The grey L shape rod is connect to high voltage where another other electric pole connect to the ground.
The L shape is actually a metal plate which provides charge transfer to the metal powder by contact.
The polarity of water will make water molecule align with electric field which hydrogen will be attract to negative while oxygen attract to positive, but I think that water will disperse into the air if it is charge enough.
 
Last edited:
OK - so you are basically pumping charges into the metal powder ... so each grain carries the same charge.
You know what like charges are going to try to do right?

There is also going to be an electric field due to the L-rod/conductor that goes through the water ... what do the water molecules do in that field? What will the metal powder grains try to do in that field?

(I have a feeling that the details of how the water acts in the field are not going to be important for your answer - depends on the context. But it is worthwhile thinking about it.)

After that you can think about how the water affects the powder grains... then work out what the forces on the grains are and how they act.
 

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