Current Flow in a Wire of Uniform Conductivity s

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SUMMARY

The discussion focuses on demonstrating that current is uniformly distributed across the cross-section of a wire made of a material with uniform conductivity, denoted as 's'. The solution involves applying Maxwell's equations and specifically utilizing Ampere's Law to relate the magnetic field (B) to the current density (J) within the wire. Participants emphasize the straightforward nature of the problem, despite initial confusion regarding the application of these principles.

PREREQUISITES
  • Understanding of Maxwell's equations
  • Familiarity with Ampere's Law
  • Knowledge of current density (J) and electric field (E) relationships
  • Basic concepts of electrical conductivity (s)
NEXT STEPS
  • Study the application of Maxwell's equations in electromagnetic theory
  • Explore the derivation and implications of Ampere's Law
  • Investigate the relationship between current density and electric field in conductive materials
  • Review examples of uniform conductivity in various materials
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Students and professionals in electrical engineering, physics, and materials science who are studying current flow in conductive materials and the application of electromagnetic principles.

chewwy
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Homework Statement


current flows in a wire of circular cross-section, made of a material of uniform conductivity s. show the current is distributed uniformly across the cross-section.

Homework Equations


This should follow easily from the maxwell equations and j=sE i assume...

The Attempt at a Solution


my mind is completely blank, even though this should be really easy.. argh. help.
 
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Try Ampere's Law relating B to J inside the wire.
 

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