Question

variation of resistivity with temperature for copper​

Answer 1

Answer:

For metals or conductors, it is said that they have a positive temperature co – efficient. The value α is positive. For most of the metals, the resistivity increases linearly with increase in temperature for a range of 500K. Examples for positive temperature co – efficient include, silver, copper, gold etc.

Answer 2

Explanation:

As temperature increases the resistance of a metal also increases because it increases the kinetic energy (speed) of electrons resulting in more collisions with themselves hence increasing the resistance.

On the other hand resistivity is the resistance of wire of unit length and area which only changes on change material of wire