How does the electric field propagates through a wire?

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Discussion Overview

The discussion revolves around the propagation of electric fields through a wire, focusing on the nature of electric fields in conductive materials when current flows. Participants explore concepts related to electric fields, charged particles, and the behavior of electrons within wires, touching on theoretical and conceptual aspects of electromagnetism.

Discussion Character

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

Main Points Raised

  • Some participants assert that an electric field is generated by charged particles and is present inside a wire when current flows.
  • Others challenge the notion that excess charge on the wire contributes to the electric field within it, suggesting that electron-electron interactions are not the primary mechanism for current flow.
  • A participant questions the relationship between electric potential energy and electric fields, indicating that the dynamics are more complex than initially stated.
  • There is a discussion about whether the electric field exists inside the wire or only on its surface, with conflicting views presented.
  • Some participants reference Jefimenko's equations to explore the relationship between electric fields and charged particles, raising questions about the physical location of these charges within the wire.
  • The concept of the skin effect is mentioned, suggesting that the electric field may behave differently in AC circuits compared to DC circuits.

Areas of Agreement / Disagreement

Participants express differing views on the existence and location of electric fields within a wire, with no consensus reached on whether the electric field is present inside the wire or only at its surface. The discussion remains unresolved regarding the specific mechanisms by which electric fields propagate in conductive materials.

Contextual Notes

Limitations include varying interpretations of electric field behavior in conductive materials, dependence on definitions of electric field generation, and the complexity of the relationship between electric potential energy and electric fields. The discussion also touches on the implications of AC versus DC circuits, which may affect the understanding of electric field propagation.

  • #31
Hello, I am asking for a clarification. It appears that nobody is differentiating between Ohms Law and how AC/DC works. This conversation is a tad murky. :-) Thanks
 
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  • #32
WoronerD said:
It appears that nobody is differentiating between Ohms Law and how AC/DC works
Ohm's law relates the E-field inside a conductor to the current density. It works for both AC and DC circuits, so I am not sure what "differentiating" needs to be done.
 
  • #33
Original questioner: are you still here? If so we could get into a very interesting discussion of how and why current flows through a conductor, pretty much without all the math involved in engineering. Last time we did this was on a question something like, "how does electricity flow thru a conductor?"

Pretty interesting stuff at a quasi quantum level. Every time it happens I learn something new about a a very "strange" process.

Also woronerD, I understand what you are saying. Same point you are making.
DC
 

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