Differences
This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision | ||
184_notes:loop [2020/08/24 13:28] – dmcpadden | 184_notes:loop [2022/04/04 12:46] (current) – hallstein | ||
---|---|---|---|
Line 16: | Line 16: | ||
As you have seen before, the [[184_notes: | As you have seen before, the [[184_notes: | ||
- | {{url>http:// | + | {{url>https:// |
As you can see, the sizes of the magnetic field vectors (the arrows) get larger as the charges get closer to the observation locations and get smaller as they pass and move away. The direction of the magnetic field is always around the path of the charges. Now, imagine a constant stream of particles very close together, that is, a current of many electrons moving in a wire. In that case, the direction of the magnetic field is still around the wire, but the magnitude stays constant. That is, **for a steady current, the magnetic field at any one point is a constant in time**. Furthermore, | As you can see, the sizes of the magnetic field vectors (the arrows) get larger as the charges get closer to the observation locations and get smaller as they pass and move away. The direction of the magnetic field is always around the path of the charges. Now, imagine a constant stream of particles very close together, that is, a current of many electrons moving in a wire. In that case, the direction of the magnetic field is still around the wire, but the magnitude stays constant. That is, **for a steady current, the magnetic field at any one point is a constant in time**. Furthermore, | ||
Line 22: | Line 22: | ||
=== Symmetry is critical === | === Symmetry is critical === | ||
- | The structure (or symmetry) of this field is very useful for Ampere' | + | The structure (or symmetry) of this field is very useful for Ampere' |
We'll start by thinking about the magnetic field outside a wire and the mathematical representation Ampere' | We'll start by thinking about the magnetic field outside a wire and the mathematical representation Ampere' |