Answer:
[tex]\sigma = 125 siemens/m[/tex]
Explanation:
Resistance, R = 10 ohms
Length, l = 5 m
Cross Sectional Area, A = 4 x 10⁻³ m²
Resistivity, [tex]\rho = \frac{RA}{l}[/tex]
[tex]\rho = \frac{10 * 4 * 10^{-3}}{5} \\\rho = 0.008 \Omega -m[/tex]
Conductivity = 1/Resistivity, i.e [tex]\sigma = 1/ \rho[/tex]
[tex]\sigma = 1/0.008\\\sigma = 125 siemens/m[/tex]
