Electrical wires are commonly made of which materials?

Electrical wires are commonly made of which materials?

• A. Copper and iron
• B. Aluminum and iron
• C. Copper and steel
• D. Tin and copper

Answer: (A)

Conductor material is chosen for high electrical conductivity, ductility, and durability. Copper is the standard because it conducts electricity very well, can be drawn into long, flexible wires, resists corrosion, and is easy to join to insulation. Iron isn’t used as the primary conductor in typical electrical wiring since its conductivity is much lower and it tends to rust. Some cables may include iron or steel in armor or structural parts, but the actual conductive path is copper. Among the options, copper paired with iron best reflects the emphasis on copper as the conductor material, while the other pairings involve less suitable conductors or non-conductor roles.

Conductor material is chosen for high electrical conductivity, ductility, and durability. Copper is the standard because it conducts electricity very well, can be drawn into long, flexible wires, resists corrosion, and is easy to join to insulation. Iron isn’t used as the primary conductor in typical electrical wiring since its conductivity is much lower and it tends to rust. Some cables may include iron or steel in armor or structural parts, but the actual conductive path is copper. Among the options, copper paired with iron best reflects the emphasis on copper as the conductor material, while the other pairings involve less suitable conductors or non-conductor roles.