Answer: A·m².
- A A·m²
- B tesla
- C weber
- D henry
Correct answer: A. A·m²
Explanation: Magnetic dipole moment has units of ampere·metre² (A·m²).
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.