Surface Currents: Finding Magnetic Field w/ Biot-Savart?

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SUMMARY

The discussion focuses on calculating the magnetic field generated by a uniform surface current density, denoted as 's', flowing around a cylindrical tube of radius 'a'. The Biot-Savart Law is suggested as a potential method for this calculation, although the possibility of using Ampère's Law is also considered due to the symmetry of the problem. The equation provided, ∫ B · dl = ∫ J · da, indicates the relationship between the magnetic field and current density in this context.

PREREQUISITES
  • Understanding of Biot-Savart Law for magnetic field calculations
  • Familiarity with Ampère's Law and its applications
  • Knowledge of vector calculus, particularly line and surface integrals
  • Concept of current density in electromagnetism
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  • Learn about the symmetry in electromagnetic problems and its implications
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Homework Statement


If a uniform current with current density s flows around a tube of radius a-- so it is a surface current, how might I find the magnetic field at some arbitrary position vector r?*

Homework Equations



Biot-Savart?

The Attempt at a Solution



I am guessing Biot-Savart? Or is there a simpler way since it has nice symmetry?
 
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Your geometry hasn't been described all that well, but why not ampere?

\int \mathbf{B} \cdot d\mathbf{l}=\int \mathbf{J} \cdot d\mathbf{a}
 

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