CBSE Class 10 Science 2019 · Paper 31/5/2 · Question 4

(1) Outside a magnet, magnetic field lines emerge from the north pole and merge at the south pole; inside the magnet they run from the south pole to the north pole. (2) Magnetic field lines are closed curves. (3) The field lines are crowded near the poles, where the magnetic field is stronger: the closer the lines, the stronger the field. (4) No two field lines ever cross (intersect) each other, because the field has only one direction at a point. Other correct properties, such as the tangent to a field line at any point giving the direction of the field there, also earn credit.