Answer: Copper.
- A Iron
- B Aluminium
- C Copper
- D Nickel
Correct answer: C. Copper
Explanation: Copper is diamagnetic (weakly repelled). Iron and nickel are ferromagnetic, and aluminium is paramagnetic.
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.