Answer: is a complete magnet.
- A is a complete magnet
- B has only one pole
- C loses all magnetism
- D becomes non-magnetic
Correct answer: A. is a complete magnet
Explanation: Each fragment is again a complete magnet with its own north and south poles.
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.