Quote:
Originally Posted by tashirosgt
.
Electric current is a flow of a scalar quantity, "charge".
Fluid flow is a flow of a scalar quantity, "mass".
Heat flow is a flow of a scalar quanity, "heat".
What would "magnetic flow" be a flow of? A scalar quantity "north"? You would need magnetic monopoles. The question is why imagining a magnetic field to be constructed of magnetic monopoles doesn't work well.
Flows have conservation laws. If the flow into a region doesn't match the flow out, then there is a build-up of something in the region (charge, mass, heat). It would be hard to build up "north"-ness somewhere without "south"-ness building up somewhere else. How do you capture that with mathematics?
|
Well maybe when the magnetic field builds up between a north and a south poles there is a flow ? I think it is like a capacitor, when the charge between the plates is not equal as the external applied voltage current will flow untill the capacitor has the same voltage. I guess something similair would happen with a magnet as well.
But how fast would this build up be. I am assuming when i would take an electromagnet and power it up with a dc power supply the build up of the magnetic field follows the current flowing through the electromagnet untill all field lines penetrate the core of the electromagnet if i am not mistaken. But how would this function in a vacuum ? I really do not know. Does a magnetic field in a vacuum also build up with the speed of light ? I find magnetic field lines curious. And how does this all relate to a permanent magnet ?