What Is the Potential at the Surface of a Charged Conductor Plate?

  • Context: Undergrad 
  • Thread starter Thread starter manjuvenamma
  • Start date Start date
  • Tags Tags
    Capacitor Principle
Click For Summary

Discussion Overview

The discussion centers around the potential at the surface of a charged conductor plate, particularly addressing the implications of a charge's self-potential and the nature of electric potential in relation to charges within a conductor. The scope includes theoretical considerations in electromagnetism and conceptual clarifications regarding charge interactions.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions the potential at the conductor plate itself, suggesting it may be infinite due to the mathematical expression of potential being inversely proportional to distance.
  • Another participant asserts that charges do not act on themselves, implying a limitation in considering self-potential.
  • A different viewpoint notes that classical electromagnetism treats charges as point charges, which avoids the issue of self-interaction, while also questioning the behavior of electric fields as one approaches a charge.
  • Further inquiry is made regarding the relationship between the charges in a conductor and the conductor itself, expressing uncertainty about the nature of potential in this context.
  • Another participant reiterates that the potential experienced by a charge is due to other charges, not the charge itself, raising questions about how to discuss potential in this scenario.

Areas of Agreement / Disagreement

Participants express differing views on the nature of potential at a charged conductor plate, with no consensus reached regarding the implications of self-potential and the treatment of charges in this context.

Contextual Notes

Participants highlight limitations in understanding the potential at the surface of a charged conductor, particularly regarding the definitions of distance and the nature of charge interactions.

manjuvenamma
Messages
102
Reaction score
0
In explaining capacitance, it is said that a conductor plate when given a charge Q develops voltage V. There is potential at every point around a chrage and it is inversely proportional to the distance. But what will be the potential at the conductor plate which is having the charge itself. That is gives me a thought. What is the potential at the charge it self? Is it infinite because it is 1/0.
 
Physics news on Phys.org
charges don't act on themselves.
 
I think that is a very interesting question. In classical electromagnetism charges are considered infinitely small infallible point charges, cleverly avoiding this problem. In the case of potential, as the previous poster said charges don't work on themselves. On the other hand, if you consider the electric field around an electron as you get closer and closer, will it get infinitely large and how will you measure it?
 
How can then we talk about potential of the conductor plate which contains the charge? What is the distance between the charges in a conductor and the conductor itself? Sorry, if I am missing some point and asking silly questions.
 
manjuvenamma said:
How can then we talk about potential of the conductor plate which contains the charge?

the potential felt by one charge is due to all the *other* charges, but not the charge itself.
 

Similar threads

  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 11 ·
Replies
11
Views
3K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 9 ·
Replies
9
Views
3K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 21 ·
Replies
21
Views
5K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 14 ·
Replies
14
Views
3K