Question

Which of the following holds true for magnetic field lines?

• A. The magnetic field lines attract each other.
• B. The magnetic field lines do not intersect each other.
• C. The magnetic field lines intersect each other.
• D. The magnetic field lines behave as if they repel each-other.

Answer 1

Answer: (B), (D)

The correct options are
B The magnetic field lines do not intersect each other.
D The magnetic field lines behave as if they repel each-other.

The magnetic field lines cannot intersect each other. If they intersect that would imply that an iron particle kept at the point of intersection will experience force in two different directions which is practically impossible. Since the field lines do not intersect or overlap, it is assumed that they are repelling in nature.