Register to reply

Current Concentrated Along Axis

by ResonantW
Tags: axis, concentrated, current
Share this thread:
ResonantW
#1
Dec9-12, 11:58 PM
P: 9
Griffiths brings up a point that it might make sense that current in a fat wire would want to concentrate itself mainly along the axis of the wire, given that parallel wires attract each other.

He then asks us to figure out why this might not happen, but to be honest I would think it should! The only thing I can think of is some sort of electric repulsion in the conduction particles' rest frame, but I feel like there are more subtle points in transforming the frames like this. Where am I going wrong?
Phys.Org News Partner Physics news on Phys.org
Researchers demonstrate ultra low-field nuclear magnetic resonance using Earth's magnetic field
Bubbling down: Discovery suggests surprising uses for common bubbles
New non-metallic metamaterial enables team to 'compress' and contain light
davenn
#2
Dec10-12, 02:02 AM
Sci Advisor
PF Gold
davenn's Avatar
P: 2,595
hi there :)

who is Griffiths and do you have a link to his study ?

Dave
Meir Achuz
#3
Dec12-12, 12:52 PM
Sci Advisor
HW Helper
PF Gold
P: 2,007
That would give j a curl. Since j=\sigma E, that would give E a curl, but curl E=0.


Register to reply

Related Discussions
Concentrated moment? General Engineering 1
Off-axis magnetic field due to a current loop in cartesian coordinates Classical Physics 2
Keeping concentrated General Discussion 20
Off-axis Magnetic Field of Current loop (MATLAB?) Math & Science Software 5
Magnetic field generated by current in semicircular loop at a point on axis Advanced Physics Homework 4