Question

At ordinary temperature, a metal has a measurable resistivity but as the
temperature decreases
(a) resistivity increases and conductivity decreases.
(b) resistivity decreases and conductivity increases.
(c) both resistivity and conductivity increases.​

Answer 1

The general rule is resistivity increases with increasing temperature in conductors and decreases with increasing temperature in insulators. ... As temperature rises, the number of phonons increases and with it the likelihood that the electrons and phonons will collide. Thus when temperature goes up, resistance goes up.

Answer 2

Answer:

A is the right answer.

Explanation:

resistivity increases and conductivity decreases.