What are the properties of magnetic lines of force?

Properties of magnetic lines of force are:

• Magnetic lines of force always form closed continuous curves.
• The direction of the lines of force is from the north pole to the south pole outside the magnet and from the south pole to the north pole inside the magnet.
• No two magnetic lines of force intersect each other.
• Densely populated magnetic lines of force show a strong magnetic field whereas less populated lines show weak magnetic field.
• Magnetic lines of force give the direction of the magnetic field at each point by making a tangent.