NEET Physics: Magnetic Materials questions with solutions

Q1. The hysteresis cycle curve for the material of a permanent magnet is:

1. short and wide
2. tall and narrow
3. tall and wide
4. short and narrow

Answer: tall and wide

A permanent magnet should be hard to demagnetize, so it has a large coercive force, making the hysteresis loop wide. It should also retain a strong magnetization, giving a large remanence, which makes the loop tall.