Answer: Ampere metre squared (A·m²).
- A Tesla, the unit of magnetic flux density
- B Weber, the unit of total magnetic flux
- C Ampere metre squared (A·m²)
- D Henry, the unit of inductance
Correct answer: C. Ampere metre squared (A·m²)
Explanation: Magnetic moment m = NIA has SI unit ampere metre squared (A·m²). Tesla is the unit of B, weber is the unit of magnetic flux, and henry is the unit of inductance.
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.