Question

why two magnetic field lines cannot intersect each other

Answer 1

Two magnetic lines cannot intersect each other because if they intersect each other then the compass needle will show two directions, which is not possible.

Answer 2

HERE IS YOUR ANSWER...

The magnetic field lines do not intersect one another. This is due to the fact that the resultant force on a north pole at any point can be only in one direction.But if the two magnetic field lines intersect one another, then the resultant force on a north pole placed at the point of intersection will be along two directions, which is not possible.

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