A wire of length 1 m and cross-sectional area 10^-6 m^2 has a resistance of 10 ohms. What is the resistivity of the material of the wire?
Correct: D
The resistance of the wire is given by R = ρ(L / A), where ρ is the resistivity, L is the length, and A is the cross-sectional area. Rearranging the equation, we get ρ = RA / L = (10 ohms) * (10^-6 m^2) / (1 m) = 10^-5 ohm-m.