Answer: The magnetic equator.
- A The magnetic equator
- B The magnetic north pole
- C The magnetic south pole
- D A point midway between the equator and a magnetic pole
Correct answer: A. The magnetic equator
Explanation: At the magnetic equator, Earth's field is purely horizontal, so a freely suspended needle shows zero angle of dip.
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.