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Magnetic force falls off very quickly with distance. The only reason magnetosphere is even detectable is because there's a phenomenally huge glob of molten iron at the core. The magnetic force from the rail is basically localized to the track.
Magnetic force falls off very quickly with distance. The only reason magnetosphere is even detectable is because there's a phenomenally huge glob of molten iron at the core. The magnetic force from the rail is basically localized to the track.