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 of a bar magnet: field lines emerge from the north pole and re-enter at the south pole outside the magnet, forming continuous closed loops. Image: Geek3, CC BY-SA 3.0, via Wikimedia Commons.
Concept context
Bar magnets, Earth's magnetism, and how different materials respond to an external magnetic field - diamagnetic, paramagnetic, and ferromagnetic behaviour.