PROPERTIES OF MAGNETIC LINES OF FORCE:
1) They are closed continuous curve.
2) They start from North Pole and end on South Pole.
3) The tangent at any point on the magnetic lines of
force gives the direction of the magnetic field at
that point.
4) No two magnetic lines of force can intersect each
other.
5) They are crowded at strong magnetic field.
6) They are weak at far from each other.