Answer: Paramagnetic.
- A Diamagnetic
- B Paramagnetic
- C Superconducting
- D Permanently magnetised
Correct answer: B. Paramagnetic
Explanation: Above the Curie temperature, thermal agitation disrupts the alignment of magnetic domains, and the material loses its ferromagnetic ordering, behaving as a simple paramagnetic substance.
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.