Question

electrical conductivity of metals... And that of semiconductor ....With increasing temperatures​

Answer 1

$\huge\mathfrak\red{Answer :) }$

As the temperature increases, the atoms in the material (both metal and semiconductors) vibrate more and more and scatter the free carriers more and decrease the mobility. The decrease in mobility is not as much as the increase in the density in the case of a semiconductor. So its conductivity increases.