Hey,

For metals

The resistivity of a material is directly proportional to the temperature. With increase in temperature the free electrons in the material begins to move frequently  that leads to increase in collision within the material. The increased collision increases the resistivity of the material.

For semiconductor

With increase in temperature the charge carriers also increase that results in decrease in resistivity.

For electrolytes

Increase in temperature results in increase in the dissociation of ions within the electrolyte that increase its conducting ability and decreases the resistivity.

Hope that helps.

Thank you.

Hey there,

The temperature dependence of resistivity on different materials are:

1) conductor- the resistivity increases on increasing temperature as free electrons collide more.

2) semi-conductor- the resistivity decreases on increasing temperature .

3) electrolyte- in electrolyte the resistivity decreases on increasing temperature because viscosity of electrolyte decreases.

Hope it helps!