The temperature of a metallic wire is raised from to while its dimensions are kept…
PHYSICS · Single correct · CBSE · Physics · Current Electricity · Current Electricity
Problem
The temperature of a metallic wire is raised from 20∘C to 50∘C while its dimensions are kept unchanged. Which one of the following quantities must increase as a result?
(a) Mobility of free electrons
(b) Electrical conductivity of the material
(c) Resistivity of the material
(d) Number density of free electrons