Concept:Magnetic lines of force represent the path along which a free north pole would move in a magnetic field.
They are continuous, non-intersecting curves.
Explanation:Magnetic lines of force never intersect one another.
If two lines crossed, the compass needle at that point would point in two different directions, which is impossible.
Lines run from the north pole to the south pole outside the magnet.
They can pass through non-magnetic materials because such materials do not block magnetic fields.
They also behave like stretched elastic cords — they are under tension and try to shorten.
Therefore, the statement that they intersect one another is incorrect.
Answer:The incorrect statement is:
D — magnetic lines of force intersect one another.