Correct option is D
Explanation:
In domestic wiring, both copper and aluminium are commonly used materials due to their conductive properties, although they are chosen based on different criteria:
1.
Copper:
·
High Conductivity: Copper has a very high electrical conductivity, making it efficient for carrying electric current with minimal resistance and energy loss.
·
Durability: Copper is also resistant to corrosion, ensuring a long lifespan in wiring systems.
·
Ease of Use: Its ductility and flexibility make it easy to install and shape into wires.
·
Safety: Copper wiring is less likely to overheat compared to aluminium, adding a layer of safety in residential settings.
2.
Aluminium:
·
Cost-Effective: Aluminium is less expensive than copper, making it an attractive option for large-scale wiring installations where cost is a significant factor.
·
Lighter Weight: Aluminium is lighter than copper, which can be advantageous in certain installations.
·
Applications: It is commonly used in branch circuits, service entrances, and sometimes in larger appliances.
Given that both materials have their advantages and are used in different situations, the most extensively used material in domestic wiring can be either copper or aluminium, depending on the specific requirements of the installation. Hence, the correct answer is
(d) Copper or aluminium.
