Question

what happen when the temperature of conductor increase ​

Answer 1

When the temperature of metallic conductor increases, the velocity of free electrons increases but it also cause increase in amplitude of vibration of metallic atoms (kernels) which cause some extra hindrance or resistance in the path of free electron. Hence resistance increases in investing the temperature

Answer 2

When the tempreture of metallic conductor increases, the velocity of free electrons increases but it also cause increase in amplitude of vibration of metallic atoms which cause some extra resistance in the path of free electrons.