Flux Line

A curved arrow on the Magnetic Field Cross-Section diagram. It shows the path the magnetic field takes as it leaves the coil, fans outward, and returns. Flux lines help you see the field's shape at a glance. Stronger arcs appear where the field is most intense. Gentler arcs appear at the edges where the field is weakening. The lines are a stylized visual aid, not a precise measurement. Actual field strength comes from the colored thermal background and the threshold markers (75 percent, 50 percent, 10 percent of peak). The arrowheads point outward and slightly downward at the apex of each arc because the field bends back toward the return path on the underside of the coil.