Answer: much greater than 1.
- A much greater than 1
- B much less than 1
- C exactly equal to 1
- D exactly zero
Correct answer: A. much greater than 1
Explanation: Ferromagnets have relative permeability far greater than 1 (hundreds to thousands).
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.