Electric Current and Potential Difference

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Discussion Overview

The discussion revolves around the behavior of electrons in a conductor when an external electrical potential difference is applied. Participants explore whether the number of free electrons in the conductor decreases as a result of this potential difference, considering the implications for charge and voltage.

Discussion Character

  • Conceptual clarification
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant questions whether the number of free electrons in the conductor decreases when a potential difference is applied.
  • Another participant suggests considering the consequences for the charge and voltage on the conductor to address the question.
  • A participant states that since the resistance is constant, they believe the answer should be no, implying that the number of free electrons does not decrease.
  • Several participants agree with the notion that at the positive end of the conductor, the number of electrons leaving equals the number entering, supporting the idea that the number of free electrons remains constant.
  • There is a reminder for participants to use the homework template for future questions, although one participant clarifies that this inquiry is not homework.

Areas of Agreement / Disagreement

Participants generally agree that the number of free electrons does not decrease in the conductor when a potential difference is applied, but there is some contention regarding the classification of the question as homework.

Contextual Notes

Some participants reference the constant resistance of the conductor and the implications for charge and voltage, but these aspects remain underexplored and unresolved.

Rozwind
when the external electrical potential difference is applied across the conductor ,electrons flow in the direction opposite to the current.Whether the number of free electrons in the conductor decrease?
 
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Hello Roz, :welcome:

A good question. Is it yours or has it been asked to you ? (if the latter, post in homework !)
For the answer, consider what the consequence would be for the charge (and thereby the voltage) on the conductor.
 
BvU said:
Hello Roz, :welcome:

A good question. Is it yours or has it been asked to you ? (if the latter, post in homework !)
For the answer, consider what the consequence would be for the charge (and thereby the voltage) on the conductor.
The question has been given in my textbook and consequences for the charge or voltage on conductor haven't been mentioned but the resistance is constant. I think the answer should be No. Am I correct?
 
Rozwind said:
I think the answer should be No
I agree. At the positive end of the conductor, just as many electrons leave as there are coming in at the other end.
 
BvU said:
I agree. At the positive end of the conductor, just as many electrons leave as there are coming in at the other end.
Ok. Thank You.
 
Next time: post in homework and make good use of the template there !
 
BvU said:
Next time: post in homework and make good use of the template there !
Actually, this isn't homework. I was reading the lesson beforehand.
 
My compliments ! good action. even so, PF considers these in-text questions and examples to fall under 'exercises' such as homework.
 

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