Which of the following is an example of a non-ferrous metal?

Copper is categorized as a non-ferrous metal because it does not contain significant amounts of iron. Non-ferrous metals are known for their resistance to corrosion, lightweight characteristics, and high electrical conductivity. Copper, specifically, is widely utilized in electrical wiring, plumbing, and heat exchangers due to these properties.

In contrast, the other materials listed—steel, wrought iron, and cast iron—are all primarily composed of iron, which classifies them as ferrous metals. Ferrous metals tend to be magnetic and can rust when exposed to moisture, unlike non-ferrous metals, which generally offer greater resistance to environmental factors. Understanding the differences between ferrous and non-ferrous metals is crucial in various applications, including construction, manufacturing, and electrical systems.