Three wires of the same diameter and length are made from three different metals: copper (ρ = 1.7 × 10^-8 Ω·m),aluminum (ρ = 2.7 × 10^-8 Ω·m),and silver (ρ = 1.6 × 10^-8 Ω·m).Which wire has the least resistance? A)the aluminum wire B)the silver wire C)the copper wire D)Since insufficient information is given to find the resistance of each wire,one cannot find the answer.

Question

Quizplus · Accepted Answer

The resistance of a wire is directly proportional to its resistivity. Silver has the lowest resistivity (1.6 × 10^-8 Ω·m) among the given metals, thus the silver wire has the least resistance.

Three Wires of the Same Diameter and Length Are Made