Why does electronic conductance decrease with increase in temparature?

Asked by  | 18th May, 2012, 08:25: PM

Expert Answer:

The reason for this very behaviour of metals is explained by the fact that at random, the free electrons moving in a metallic object also collide with the atoms contained in the wire. Due to these collisions, their kinetic energy is wasted to some extent. 
When the temperature of such a metallic wire is increased, their collisions with the containing atoms become more frequent and ultimately more energy is wasted. This obviously reduce their thermal and electrical conductivity.

Answered by  | 19th May, 2012, 10:15: AM

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