Distinguishing magnetic (ferromagnetic) and non-magnetic metals

Steps:

• Identify ferromagnetic metals as those strongly attracted to magnets, like iron and steel (alloy with iron).
• Identify non-magnetic metals as those not attracted, like copper and aluminium.
• Evaluate options: A lists two non-magnetic metals; B and D list two magnetic metals.
• Select the option with one ferromagnetic and one non-magnetic metal.

Why C is correct:

• Steel is ferromagnetic due to its high iron content, which aligns magnetic domains; copper is diamagnetic and repels weak magnetic fields, making it non-magnetic.

Why the others are wrong:

• A: Both aluminium and copper are non-magnetic and not attracted to magnets.
• B: Both iron and steel are ferromagnetic and attracted to magnets.
• D: Both steel and iron are ferromagnetic and attracted to magnets.

Final answer: C