Question

What does the degree of closeness of magnetic field lines at a given region represent? Can two magnetic field lines intersect?

Answer 1

1. The degree of closeness of magnetic field lines gives the strength of the magnetic field in that region.
2. The closer the field lines, the stronger the magnetic field and vice-versa.
3. Two magnetic field lines can never intersect each other because, at the point of intersection, two tangents can be drawn at the point of intersection which means two directions of the magnetic field at a point which is not possible.