Answer :
Answer:
material is aluminum by the approx value of conductivity
Explanation:
given data
length = 3 km
temperature = 20 °C
metallic wire = AWG-6
resistance = 6Ω
to find out
What material is it made of
solution
we know that AWG - 6 has a diameter of 4.1 mm
so we know resistance R is
R = [tex]\frac{l}{\sigma A}[/tex]
here A is area and R is resistance and l is length so find here σ
σ = [tex]\frac{l}{R A}[/tex]
σ = [tex]\frac{3*10^3}{6*\pi (\frac{4.1}{2} )^2}[/tex]
σ = 3.79 ×[tex]10^{7}[/tex] S/m
so according to table 2-1
material is aluminum by the approx value of conductivity