Which of the following materials is most commonly used for electrical wiring due to its low resistance?

Copper is the most commonly used material for electrical wiring primarily because of its excellent electrical conductivity, which is indicative of its low resistance. This property allows electric current to flow efficiently, minimizing energy loss due to heat. Copper strikes a balance between conductivity, flexibility, and cost-effectiveness, making it the preferred choice for both residential and industrial wiring applications.

While silver is an even better conductor than copper, its high cost and relative scarcity limit its use in everyday wiring. Iron and nickel do not exhibit the same level of conductivity as copper, and they also tend to be heavier and less malleable, making them less suitable for wiring purposes. Therefore, copper’s unique combination of properties makes it the go-to material for electrical wiring.