Magnectic force on current carrying wire

[bharath423]

Homework Statement

The net charge in a current-carrying wire is zero.Then,why does a magnetic field exert a force on it?

Homework Equations

dF=I*dl x B

The Attempt at a Solution

if we take a small portion of wire the net charge is zero,so if i take the frame of electrons that is I am moving so i have a charge with me..and i get a force due to it..i don't know weather my explanation was correct or wrong??

dont go to lorentz transformation to explain..(in case needed)..because i don't have the idea of relativity theory in maxwell equations..im saying this because i had read many post on similar kind of topic where every one finally explained with lorentz transformation..saying that in one frame its magnetism..its electricity in another frame..

 

[dulrich]

What does the net charge have to do with it? A moving charge will experience a force in a magnetic field via F = qv x B. The current is just a lot of negative charges moving, so the current should feel the same force. The positive charges are stationary, so there is no counter-balancing magnetic force on them.

 

[bharath423]

yes..thank u...