I have read that in non-metals solids the electric resistivity is reduced if we increase temperature.But this isn't logical.I mean if temperature is increased ok the electrons get extra energy but as well the vibration of the atoms is increased so electric resistivy is increased.Temperatures cant make electrons overcome the band gap easily.There should be an increase till the temperature is high enough so with little energy the valence electrons would get ionized and then electric resistivity to be dicreased. Where am I wrong?Help appreciated
closed as off-topic by Mithoron, Mathew Mahindaratne, Todd Minehardt, aventurin, andselisk♦ Mar 3 at 3:53
This question appears to be off-topic. The users who voted to close gave this specific reason:
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Between 273 K and 500 K the intrinsic carrier concentration in Si increases by about 5 orders of magnitude. Compare with the decrease in conductivity of a metal over that range. Increase in carriers far outweighs the increased scattering of carriers.