Is conducting shell =uniformly charged thin spherical shell?

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Discussion Overview

The discussion centers around the relationship between a conducting shell and a uniformly charged thin spherical shell, particularly in the context of electric field distribution and charge behavior. Participants explore the assumptions underlying these concepts, including the implications of charge distribution and the effects of external electric fields.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Exploratory

Main Points Raised

  • Some participants question whether a conducting shell is the same as a uniformly charged thin spherical shell, noting similarities in charge distribution and electric field behavior.
  • It is proposed that if there are no external electric fields and the shell is spherical, the charge on a conducting shell would distribute itself uniformly on the surface.
  • Others express uncertainty about the assumptions of uniform charge distribution and the implications of external influences on the charge behavior of a conducting shell.
  • Some participants assert that all charges on a conducting sphere will reside on the surface, and later responses confirm that this distribution is uniform.
  • There is a discussion about the interchangeability of the terms "conductive shell" and "uniformly charged thin spherical shell," with some suggesting that context matters and that the terms may not always be synonymous.
  • A participant raises concerns about the clarity of assumptions made in physics problems, particularly regarding whether a shell is conductive or uniformly charged in the presence of external fields.
  • One participant expresses confusion about why charges are assumed to reside on the surface of a uniformly charged thin spherical shell if it is not explicitly stated to be metallic or conductive.

Areas of Agreement / Disagreement

Participants do not reach a consensus on whether the terms "conductive shell" and "uniformly charged thin spherical shell" are interchangeable, indicating multiple competing views and unresolved questions regarding the assumptions involved.

Contextual Notes

Participants highlight the importance of assumptions regarding external electric fields and the shape of the shell, which may affect charge distribution and the applicability of the concepts discussed.

gracy
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I want to ask Is conducting shell same as uniformly charged thin spherical shell?
Because while finding Electric field due to uniformly charged thin spherical shell surface charge density is taken the same happens in case of conducting/metallic shell all the charges reside on surface similarly The electric field due to a uniformly charged thin spherical shell is zero at all points inside the shell same is true for conducting shell.
 
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gracy said:
I want to ask Is conducting shell same as uniformly charged thin spherical shell?
Because while finding Electric field due to uniformly charged thin spherical shell surface charge density is taken the same happens in case of conducting/metallic shell all the charges reside on surface similarly The electric field due to a uniformly charged thin spherical shell is zero at all points inside the shell same is true for conducting shell.
If you assume that there is no other electric field from an external source and if you assume that the shell is spherical then how will the charge on the "conducting shell" distribute itself?

Those two assumptions need not be the case.
 
jbriggs444 said:
If you assume that there is no other electric field from an external source and if you assume that the shell is spherical then how will the charge on the "conducting shell" distribute itself?

Those two assumptions need not be the case.
Did not understand.
 
gracy said:
Did not understand.
If you have a conducting sphere, how will the charge on the sphere (if any) distribute itself?
 
jbriggs444 said:
If you have a conducting sphere, how will the charge on the sphere (if any) distribute itself?
All charges will reside on the surface.
 
gracy said:
All charges will reside on the surface.
And will they be uniformly distributed?
 
jbriggs444 said:
And will they be uniformly distributed?
yes.
 
gracy said:
yes.
So back to your original question -- can you see the similarity between the charge distribution on a "conductive shell" and that on a "uniformly charged thin spherical shell"?
 
jbriggs444 said:
can you see the similarity between the charge distribution on a "conductive shell" and that on a "uniformly charged thin spherical shell"?
Yes.
 
  • #10
conductive shell & "uniformly charged thin spherical shell"?
Are the two terms interchangeable ?
 
  • #11
gracy said:
conductive shell & "uniformly charged thin spherical shell"?
Are the two terms interchangeable ?
What do you think?
 
  • #12
I think ,Yes.
What do you think?
 
  • #13
gracy said:
I think ,Yes.
What do you think?
That it depends on the situation and on how much one can trust the writer.

If the writer is a tricky sort, a "conductive shell" might not be spherical. If there are other electrical fields or charged bodies in the area then the charge distribution on a "conductive shell" may not be uniform.

If the writer is a very tricky sort, a uniformly charged thin spherical shell might or might not be conductive and accordingly, might or might not remain uniformly charged in the presence of an external electric field.

In a physics exercise, one of the challenges is to determine whether the author is contemplating such complications or is assuming them away for simplicity.
 
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  • #14
Actually I asked this because I was only given that there is uniformly charged thin spherical shell then my teacher took charges on the surface,that's where I got confused.Why charges on surface if it is not given that the shell is metallic or conductive.
 

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