alleryAmong Cu, Al, Fe and Hg, the BEST conductor of electricity at room temperature is:
ACu
BAl
CFe
DHg
Answer & Solution
Correct answer: A. Cu
1. Resistivity order (lowest first): Ag < Cu < Al < Au < Fe < Hg.
2. Among the four given, Cu has the lowest resistivity.
3. That's why copper is the standard household-wiring material.
_Source: syllabus Science Ch 11 Table 11.2 Resistivity of Materials_
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