An electric charge feels its own self electric field

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Discussion Overview

The discussion centers on the concept of whether an electric charge feels its own generated electric field, exploring implications within classical electromagnetism. Participants question the traditional understanding that a charge does not experience its own field and consider the relevance of this effect in practical scenarios.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant asserts that in reality, a charge feels its own electric field, challenging the classical view.
  • Another participant questions the basis for this assertion, seeking clarification on how it is known.
  • A third participant references the Abraham-Lorentz force as a potential explanation but indicates a need for further research before elaborating.
  • A fourth participant suggests that the Feynman Lectures on Physics provide valuable insights into the topic, although they note the material may be somewhat dated.

Areas of Agreement / Disagreement

Participants do not reach a consensus; there are competing views regarding whether a charge feels its own electric field and the implications of this effect.

Contextual Notes

The discussion reflects uncertainty regarding the significance of the self-field effect and its practical implications, as well as reliance on specific interpretations of classical electromagnetism.

fog37
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Hello,

In classical electromagnetism, we learn that an electric charge generates and electric field which other charges can feel through a force. But the source charge does not feel its own generated electric field.

In reality, a charge feels its own field. Why are we able to ignore this effect? Is it truly small for all practical purposes?

Thank you!
 
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fog37 said:
In reality, a charge feels its own field.

How do you know this?
 
Well, I was reading something about the Abraham-Lorentz force. But I need to read more before I can share more explanations...
 
The Feynman Lectures on Physics, Volume 2, Chapter 28, has an excellent introduction to this question. , which is very readable, although perhaps somewhat dated. It is available for free online here.

http://www.feynmanlectures.caltech.edu/II_28.html
 
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