magnetic field line; line of magnetic force
Physics term for an imaginary line representing the direction and strength of a magnetic field. Used in contexts like electromagnetism and geophysics.
Magnetic field lines run from the north pole to the south pole.
This diagram shows the magnetic field lines around a magnet.
磁束 (magnetic flux) is a measure of the total magnetic field passing through a given area, whereas 磁力線 are the conceptual lines representing the field.
Compound of 磁力 (magnetic force) + 線 (line). A straightforward technical term.