Magnetism and Matter — Physics STD 12 Science — Question

Magnetic field lines are drawn with the help of iron fillings or magnetic needle. Four main characteristics are :
(1) More the number of force lines passing through a point, more strong will be magnetic field at that place.
(2) Two force lines never intersect each other.
(3) Tangent drawn at any point on the field lines gives the direction of magnetic field at that point.
(4) They are directed from north pole to south pole outside the magnet and inside the magnet, their direction is from south pole to north pole.