Why Do Different Sources Show Varying Electric Flux Equations?

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Homework Help Overview

The discussion revolves around the concept of electric flux and Gauss's law, as presented in different textbooks. The original poster notes discrepancies in the equations for electric flux between Serway's and Schaum's electromagnetics texts.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the definitions of electric flux in different contexts, questioning the basis of the equations provided in the textbooks. There is an inquiry into whether the flux is defined in terms of the electric field (E) or the electric displacement field (D).

Discussion Status

The discussion is ongoing, with participants examining the implications of defining electric flux in terms of different fields. Some guidance has been provided regarding the relationship between E and D, but no consensus has been reached on a singular equation for electric flux.

Contextual Notes

Participants are considering the definitions and contexts provided in different textbooks, which may lead to varying interpretations of electric flux. There is an acknowledgment of the need to clarify the relationship between the fields involved.

Jimmy84
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Homework Statement



Im starting to read about the electric flux and gauss's law. I am reading two books, Serway and Schaums electromagnetics.

The weird thing is that I'm getting different equations for the electric flux

Serway says that the Electric flux ψ is ∫E ds = 1/ε ∫ρ dv = Q/ε

While in other books I found that The Electric flux ψ is ∫ρ dv = Q

What is the real Electric flux equation ?

Thanks a lot.

Homework Equations





The Attempt at a Solution

 
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In Schaum's, is the flux ψ defined in terms of the field E or the field D?
 
TSny said:
In Schaum's, is the flux ψ defined in terms of the field E or the field D?

it is defined in terms of D

as ∫D ds = Q = ψ
 
Ok, that should account for the difference if you look at the relationship between E and D.
 

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