Answer: hard magnetic, like steel.
- A hard magnetic, like steel
- B soft magnetic material
- C a diamagnetic one
- D a paramagnetic one
Correct answer: A. hard magnetic, like steel
Explanation: Hard magnetic materials (e.g. steel) retain magnetism and are used for permanent magnets.
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.