$18$

$1$

What is the difference in resistance between a silver and a copper cables with the same $12-$gauge diameter of $2\mathrm{.}05$ mm and length of $3$ m $($hence total length $=6m)$ by assuming that $(Cu)=1\mathrm{.}7{10}^{-8}\frac{}{m}$ and $(Ag)=1\mathrm{.}6{10}^{-8}\frac{}{m}.$

$2\mathrm{.}9{10}^{-2}$

$4\mathrm{.}1{10}^{-3}$

$9\mathrm{.}0{10}^{-4}$

$3\mathrm{.}1{10}^{-2}$

$1\mathrm{.}8{10}^{-3}$