3.6 A negligibly small current is passed through a wire of length 15 m and uniform cross-section , and its resistance is measured to be 5.0 Ω. What is the resistivity of the material at the temperature of the experiment?
Given,
Length of the wire, l = 15 m
The cross-sectional area of the wire, A =
The resistance of the wire, R = 5 Ω
We know,
, where is the resistivity of the material
Hence, the resistivity of the material of wire is