Recent content by No_Money

Yeah DaveE...i guess I'm asking how do they create a "computer model of the field" ? . And ok...i'll have a look at this "tomography " and see what that's about. I already checked out magnetometers or hall-effect sensors . And yes, they seem to be used to measure the field locally. But would be...

Ok, i see what you are saying. But how do they analyse the field using computers. I'm guessing that they must be able to create a model of the field "inside" the computer somehow...like how do they harness the information in the field...how do they get this information into the computer ?

Lets say we have a Direct Current (not an alternating current) going through a wire ; so there is a steady-state magnetic field created around the wire. Then let's say we move some object into the magnetic field that disturbs the field. . My question is : How do we/they get information...