A question is physics (electricity)

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Homework Help Overview

The discussion revolves around a problem in electricity concerning conductors and their surface charge densities. The original question appears to involve proving the existence of at least one conductor that does not have negative surface charge density, given a set of conductors with an overall positive load.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to clarify the original question and its translation. Questions are raised about the relationship between surface charge density, electric fields, and potentials of conductors, suggesting these concepts may be relevant to the proof being sought.

Discussion Status

The discussion is ongoing, with participants exploring the implications of the problem and providing hints to guide understanding. There is no explicit consensus yet, but some productive lines of reasoning have been suggested.

Contextual Notes

There is mention of a translation issue, which may affect the interpretation of the problem. The original statement about the existence of conductors with non-negative surface charge density is being clarified among participants.

s21288
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"Everything there is in the universe is a number of conductors that their overall load is greater than zero. Prove that there is at least one conductor with no negative density surface charge anywhere"
thx for any help...
 
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Is that the original question? It looks like a translation, and it is tricky for me to guess the initial problem.

We have a [finite] set of conductors with an overall [charge?] greater than zero? And the task is to prove the existence of a conductor with positive charge density on its whole surface?

In that case: What do you know about potentials of conductors?
What do you know about the relation between (surface) charge density and electric fields?
Those two should give you an idea how to approach that.
 
actually it is a translation from hebrew... you translated it right but they say "to prove the existence of at least one conductor with no negetive surface charge density anywhere on it"
 
Okay, I should have written "positive or zero", as this is identical to "not negative".
See my hints to get some idea how you could start.
 

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