Image: Magnetic rope
Size of this PNG preview of this SVG file: 262 × 432 pixels. Other resolution: 145 × 240 pixels.
Original image (SVG file, nominally 262 × 432 pixels, file size: 14 KB)
Description: The self-constricting magnetic field lines and current paths in a Birkeland current (or magnetic rope). The current is strongest at the axis and becomes weaker further away. Current flows parallel to the magnetic field, and derives partly from an external axial field and partly from the toroidal field produced by the current itself.
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