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Band Theory and Types of Solids

Why the condu...

Question

Why the conductivity of metals decreases with increase in temperature??

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Solution

On increasing temp resistance increases in a metal wire and conductivity dec.

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Q. Conductivity of metal decreases with temperature while conductivity of electrolytic conductors increases with temperature. Why ?

Q. Give the reasons for following.
The conductivity of metals decreases with the rise in temperature.

Statement- 1 :

Conductivity of a metallic conductor decreases with increase in temperature.

Statement- 2 :

On increasing temperature the number of free electrons in the metallic conductor decreases.

Q. Why conductivity of conductor decreases while of semiconductor increases with increasing temperature?

State True or False.

Electrolytic conduction increases with temperature, whereas metallic conduction decreases with temperature.

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