Answer: Inversely proportional to the absolute temperature.
- A Directly proportional to the absolute temperature
- B Independent of temperature
- C Inversely proportional to the square of the temperature
- D Inversely proportional to the absolute temperature
Correct answer: D. Inversely proportional to the absolute temperature
Explanation: Curie's law gives χ = C/T, where C is the Curie constant, so paramagnetic susceptibility decreases as temperature rises.
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.