Which property is a primary reason metals are used for electrical wiring?

• A. High electrical conductivity
• B. High melting point
• C. Non-conductivity
• D. Brittleness

Answer: (A)

Metals are used for electrical wiring mainly because they conduct electricity exceptionally well. In metallic bonding, electrons are delocalized and form a “sea” that can move freely, so electric charges flow through the material with relatively little resistance. This high conductivity lets thin wires carry significant current without overheating. The fact that metals are ductile—able to be drawn into long, flexible wires—comes from the same bonding and supports practical wiring. A high melting point isn’t the defining reason for wiring, and non-conductivity would mean no current could flow, while brittleness would make forming durable wires difficult.