Answer: attract each other.
- A attract each other
- B repel each other
- C do nothing at all
- D cancel out
Correct answer: A. attract each other
Explanation: A north pole and a south pole attract each other.
Magnetic field lines form closed loops: outside the bar magnet they run from the N pole to the S pole; inside, they continue from S back to N, so the lines never start or end anywhere.
Concept context
Bar magnets, Earth's magnetism, and how different materials respond to an external magnetic field - diamagnetic, paramagnetic, and ferromagnetic behaviour.