Charge on Surface with Sharp Features

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Discussion Overview

The discussion revolves around the behavior of electric fields on a metallic surface with sharp features when a charge is placed inside. Participants explore the implications of charge distribution and electric field strength in relation to the geometry of the surface.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests that a metallic surface will be equipotential, leading to maximum charge density at sharp points, which in turn implies that the electric field just outside these points should be maximum.
  • Another participant raises a concern regarding the application of Gauss's law, noting that if a Gaussian surface coincides with the sharp points, the electric field at points equidistant from the center of the Gaussian sphere would be uniform, conflicting with the earlier assertion about maximum field strength at sharp points.
  • Some participants express a need for visual aids to better understand the problem and proposed solutions, indicating that the textual description is insufficient.
  • A participant attempts to provide a mathematical representation of the surface geometry to clarify their point, suggesting specific equations to describe the curves involved.
  • Another participant requests that discussions not be duplicated across multiple threads, indicating a concern for maintaining clarity and organization in the forum.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus, as there are conflicting views regarding the behavior of the electric field in relation to the sharp features of the surface and the implications of Gauss's law.

Contextual Notes

The discussion includes assumptions about the nature of the metallic surface and the charge distribution, as well as the geometric configurations being considered. There are unresolved mathematical implications related to the application of Gauss's law in this context.

nishant
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take a randomly drawn surface,put some charge inside it,this surface should be having some sharp features.if this thing is a metallic surface then it 's surace will be equipotential,due to this charge density on the sharp points will be the maximum,therefore electric field just outside this surace near the sharp points will be the maximum.But now if we take a gaussian sphere with the charge in it such that this gaussian surface coincides with the sharp points then the electric field at all points equidistant from the centre of the gausian sphere will be the same which does not coincide with the above result that the e.f shpuld be maximum near the sharp points.{NOTE:try to take a symmytric shape having symmytric sharp points while drawing the random model}
 
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i'll appreciate if somebdy answers this
 
Draw some picture, instead of talking...can not understand the problem and the solution you are posing...
 
see I don't know how to draw a picture in this box so I will give u a region which is same as the diagram I want to convey
a^2y^2=x^2{a^2-x^2} and thein the second curve replace x by y and vice versa.
the circle may be given by x^2+y^2=a^2
 

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