Why Is Potential Higher at the Positive End of a Conducting Rod?

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Discussion Overview

The discussion revolves around the concept of electric potential in a conducting rod when an induced electromotive force (emf) is present. Participants explore the relationship between charge distribution and potential, particularly focusing on why the positive end of the rod is considered to have a higher potential despite the accumulation of negative charges at the other end.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions why the positive end of a conducting rod has a higher potential when negative charges accumulate at the negative end, suggesting that this might imply the negative end should be at a higher potential.
  • Another participant clarifies that the conventional understanding of potential is based on positive charge, stating that a region with low negative charge corresponds to a region of high positive charge, thus explaining the higher potential at the positive end.
  • A further point is raised regarding the flow of negative charges, emphasizing that they move from lower to higher potential, while also noting the influence of the magnetic field on electron movement.
  • A later reply expresses understanding of the concepts discussed, indicating a resolution for that participant.

Areas of Agreement / Disagreement

Participants exhibit some disagreement regarding the interpretation of potential and charge flow, with multiple competing views on the relationship between charge accumulation and potential. The discussion remains unresolved in terms of a definitive consensus on the conceptual framework.

Contextual Notes

Limitations include potential misunderstandings of conventional charge flow and the effects of magnetic fields on electron movement, which are not fully explored or resolved in the discussion.

HAL10000
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When an induced emf is created in a conducting rod why is the resulting potential higher at the positive end of the rod?

Since the electrons accumulate at the negative end of the rod then wouldn't this be the higher potential instead?

Don't negative charges flow from lower to higher potential?
 
Last edited:
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The potential is usually talked about in conventional way. What you say is correct. But conventionally, positive charge is spied upon. The region having low negative charge is nothing but a region with high positive charge(w.r.t. conductor in this case). The end having high positive charge is considered to be havin the highest potential. If you follow the electrons, vice versa.
 
HAL10000 said:
Don't negative charges flow from lower to higher potential?

The magnetic field which is inducing the emf exerts another force and moves the electrons against the will of the electric field. After all

F=q(E+v\times B)
 
Thanks, I understand now
 

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