Electron Flow: Positive to Negative?

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Discussion Overview

The discussion centers around the direction of electron flow in electrical circuits, specifically addressing the convention of current flow from positive to negative versus the actual flow of electrons from negative to positive. It touches on historical definitions and the implications of charge carriers in different contexts.

Discussion Character

  • Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions the conventional depiction of electricity flowing from positive to negative, suggesting that electrons actually flow from negative to positive due to like charges repelling.
  • Another participant explains that the definition of current flowing from positive to negative was established before the discovery of electrons and is arbitrary, noting that electrons flow in the opposite direction.
  • Participants mention the term 'conventional current' to describe this established convention.
  • There is a humorous reference to Benjamin Franklin's role in this convention, indicating a historical context.
  • It is noted that in certain situations, such as in electrolytes, some charge carriers can be positive, which complicates the understanding of current flow.
  • Some participants suggest that the distinction between the movement of positive and negative charges may not significantly impact most practical applications.

Areas of Agreement / Disagreement

Participants express differing views on the direction of current flow versus electron flow, with some acknowledging the historical context while others focus on the implications of charge carriers. The discussion remains unresolved regarding the significance of these distinctions in various contexts.

Contextual Notes

The discussion highlights the limitations of conventional definitions and the potential for confusion regarding charge carriers in different scenarios, without resolving these complexities.

cragar
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I am looking in my differential equations book , and it shows electricity flowing from the positive to the negative , this seems wrong to me ,
i thought electrons flow away form the negative to the positive , because like charges repel .
 
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The current is 'defined' to flow from positive to negative. This was established before people knew about electrons, and is actually completely arbitrary. It just turned out later that the electrons are negative and thus flow from negative to positive instead. We simply kept the direction of current as it was, so now, the direction of electron flow and the direction of the current are exactly opposite.
 
o i got ya
 
its called 'conventional current'.
 
it's benjamin franklin's fault (not a joke)
 
nice
 
Note that there are situations (like current in an electrolyte) where some of the charge carriers are positive. For most things it doesn't matter if a current is due to positive charges moving one way, negative charges moving the opposite, or a mix of both.
 

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