When the resistance of a conductor increases, its temperature also increases. But what is the reason behind it? If you don’t know then don’t worry because today we are going to discuss that why rise in temperature of a conductor is accompanied by rise in resistance?
The resistance of a conductor arises due to the collision of electrons with the atoms of the conductor. When temperature increases, the amplitude of vibration of the lattice atoms also increases. Therefore, more collisions of electrons occur with lattice atoms. Hence more resistance is offered to the electrons in the conductor. The rise in resistance for a conductor at a temperature “T” is given as:
RT = Ro (1 + αT)