# Surface currents

by MarkovMarakov
Tags: electro magnetism
 P: 34 1. The problem statement, all variables and given/known data 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?* 2. Relevant equations Biot-Savart? 3. The attempt at a solution I am guessing Biot-Savart? Or is there a simpler way since it has nice symmetry?
 P: 1,877 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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