The conductivity of a conductor decreases with temperature because, on heating:

The conductivity of a conductor decreases with temperature because, on heating:
  1. Atoms vibrates vigorously
  2. Conductor expands
  3. Electrons gain energy
  4. Electrons vibrate vigorously

Solution

In metals, conductivity is due to movement of free electrons. When temperature increases, the vibration of metal ions increases. This results in increase in resistance of metal and hence, decrease in conductivity.

Asked in: AP EAMCET 2021 (20 Aug Shift 2)

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