|Register to reply||
Find all the bound currents. What is the net bound current flowing down the wire?
|Share this thread:|
Nov12-11, 07:39 AM
1. The problem statement, all variables and given/known data
A current I flows down a long straight wire of radius a. The wire is made of linear material with susceptibility chi(subscript m), and the current is distributed uniformly.
i) what is the magnetic field a distance s from the axis?
ii) Find all the bound currents. What is the net bound current flowing down the wire?
3. The attempt at a solution
i) I found a similar homework question on this website:
which says that B=[mu Is/(2pi a^2)]phi-hat
ii) J(subscript M)= curl M
= [(chi(subscript M) I)/(pi a^2)] z-hat
integral of [(chi(subscript M) I)/(pi a^2)] z-hat dS
= loop integral of [(chi(subscript M) I)/(pi a^2)] z-hat. dl
why does J(subscript M) have to be integrated over the surface, though?
j(subscript m)=M cross n-hat
=[- chi(subscript M) Is/(2 pi a^2)]z-hat ?
why does http://maxwell.uncc.edu/gjgbur/cours...k11answers.pdf
say that j(subscripr m) has to be integrated over the perimeter? How do I do this? And why is the result of it supposed to be zero? Please help
|Register to reply|
|Equivalence between bound electric currents & bound magnetic charge in magnetization||Classical Physics||6|
|Quick question regarding bound currents.||Classical Physics||2|
|How do we find the least upper bound and greatest lower bound?||Calculus & Beyond Homework||2|
|Bound currents problem||Advanced Physics Homework||2|
|Bound currents||Classical Physics||2|