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 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.