Question

Why does resistance of a metallic conductor increases with increase in temperature 0?

Answer 1

because the área of cross section and resistance is inversely proporcional
mark me as brainliest

Answer 2

$\bf Hey\:There\:!$

The resistance of a conductor increases with an increase in temperature because the thermal velocity of the free electrons increase as the temperature increases. ... This results in an increase in the number of collisions between the free electrons.