1.

why do magnetic field lines never intersect each other

Answer» Because at the point of intersection there will be two directions of magnetic field which is not possible
Because magnetic field lines have only one direction and that is North to South and it cannot go both the direction at same time
Because it is never observed a magnet showing 2 directions together at same time that is why it is said
Bcozz if they intersect then it would mean that at the point of intersection the compass needle has to point in two different directions which is nearly not possible....


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