What is the Origin of the Electric Field in F-N-L's Law?

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Discussion Overview

The discussion centers on the origin of the electric field in Faraday's law of electromagnetic induction, specifically in relation to the equation involving the electric field \(\vec E^*\) and the magnetic field \(\vec B\). Participants are exploring theoretical aspects of electromagnetism and the definitions of the fields involved.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant seeks clarification on the origin of the electric field \(\vec E\) in the context of Faraday's law, specifically asking for its definition and source.
  • Another participant states that the electric field intensity is defined as \(E = \frac{F}{q}\), where \(F\) is the force acting on a charge, suggesting a relationship between force and electric field.
  • A different participant points out that the electric field mentioned may refer to the electrostatic field, which has a circulation of zero, implying a distinction between electrostatic and induced electric fields.
  • One participant questions whether the inquiry is about the origin of the electric field in Faraday's law or the relationship between \(\vec E\) and \(\vec B\) in the equation provided.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus, as there are differing interpretations of the electric field's origin and its relationship to the magnetic field. Multiple competing views remain regarding the nature of the electric field in this context.

Contextual Notes

There are unresolved aspects regarding the definitions of the electric field and its distinction from electrostatic fields, as well as the implications of the circulation being zero in certain contexts.

Ryuzaky
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Good evening. Can anyone explain me the origin of the electric field in the F-N-L's law ?
I'm referring to this one :

[itex]\int_l \vec E^* d\vec l =-\int_s \frac{\partial \vec B}{\partial t} d\vec S[/itex]

where [itex]\vec E^*[/itex] is defined as (i'm reporting the words of the book) :
[itex]\vec E - \vec v \times \vec B[/itex].

in particular what is [itex]\vec E[/itex] and what is its origin.

//I apologize for any syntax/grammar error, I have to improve my English, I'm Italian.
 
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It's the intensity of the electric field.


[itex]E[/itex][itex]=[/itex][itex]\frac{F}{q}[/itex],
where F is the force, which the field acts on the electric charge


Intensity of the electric field is used to characterize the electric field.
 
But that is the electrostatic field and its circuitation is 0 !
 
Last edited:
do you want to know where the E field comes from in faradays law or how E is related to B in that equation.
 

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