How Does Electron Flow Correspond to Electric Field Direction in Circuits?

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Homework Help Overview

The discussion revolves around the relationship between electron flow and electric field direction in circuits, particularly focusing on the implications of charge movement in relation to potential differences. The subject area is primarily electricity and circuits.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to reconcile the movement of electrons with the established analogy of positive test charges and questions how this affects the understanding of electric field direction. Some participants clarify that electrons move with the electric field, while others express confusion about the implications of this movement.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of how electron flow corresponds to electric field direction. Some have offered clarifications regarding the nature of electric fields and charge movement, but there is no explicit consensus yet.

Contextual Notes

There appears to be some confusion regarding the definitions of potential and the direction of electric fields in relation to electron flow, which may stem from differing interpretations of the analogy used in educational resources.

tripleA
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Homework Statement


Sorry if this is not a good fit for this sub-forum but i couldn't find anywhere else to post it. In the physics tutorial
http://www.physicsclassroom.com/Class/circuits/topic on current electricty it defines the positive terminal as the high potential terminal and the negative as the low potential. When talking about positive test charges this analogy makes sense, the charge moves from the +ve to the -ve where it loses potential till it has to be "topped" up by the cell.

What confuses me when they begin talking electrons. Using this analogy would mean that the electrons move from the -ve to the +ve but this means work would have to be used to move against the electric field so the potential energy increases till it reaches +ve terminal.

My question is how does this analogy,if it does, change to accommodate electrons? Does the electric field reverse so the -ve terminal is the high potential and the +ve the low potential?

Homework Equations


The Attempt at a Solution

 
Last edited:
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Electrons moving from -ve to +ve are not moving against the field. They are negatively charged and so are moving with the field.
 
I thought the electric field was from the +ve to the -ve
 
It is.
 
Im sorry if iv'e misunderstood. Are you saying that work is not used to move electrons from the negative terminal to the positive terminal when the electric field is acting from the positive terminal to the negative terminal?
 
Electrons are negatively charged and so move against electric field lines naturally. It's the opposite of the positive test charge.
 

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