* Increased Vibrations: As temperature rises, atoms within the conductor vibrate more vigorously. This increased vibration disrupts the smooth flow of electrons, making it harder for them to move freely through the material.
* Collisions: The vibrating atoms collide more frequently with the moving electrons, hindering their progress and reducing conductivity.
Exceptions:
* Semiconductors: In semiconductors, the opposite is true. As temperature increases, the conductivity of a semiconductor increases due to the increased excitation of electrons into the conduction band.
* Superconductors: At extremely low temperatures, certain materials become superconductors, exhibiting zero resistance. In these cases, increasing temperature will eventually destroy the superconducting state and lead to a sharp increase in resistance.
In summary: For most conductors, rising temperature leads to decreased conductivity. This is due to increased atomic vibrations and collisions with electrons, which hinder the flow of electrical current.
