Which of the following best describes how the resistivity of most metallic conductors…
PHYSICS · Single correct · CBSE · Physics · Current Electricity · Current Electricity
Problem
Which of the following best describes how the resistivity of most metallic conductors varies with temperature near room temperature?
(a) It decreases approximately linearly with temperature because increased thermal energy frees additional conduction electrons.
(b) It remains essentially constant because resistance rather than resistivity changes with temperature for a given metal.
(c) It increases approximately linearly with temperature because more frequent lattice vibrations impede electron motion.
(d) It varies inversely with temperature, ρ∝1/T, since higher temperature raises the average drift speed of electrons.