Question

Which of the following statement is incorrect with respect to metallic or electronic conductivity ?

• A. Metallic conductivity depends on the number of electrons in the valence shell of an atom of metal
• B. Metallic conductivity depends on the structure of metal and its characteristics
• C. The electrical conductivity of metal increases with increase in temperature
• D. There is no change in the structure of metal during electrical conduction

Answer 1

Answer: (C)

The electrical conductivity of metal increases with increase in temperature

Metallic or electronic conductivity is due to the presence of free electrons or/and holes (positive charge). It depends upon:
(i) Number of valence electrons present in the metal
(ii) Structure and nature (characteristic) of metal
(iii) Density of metal
(iv) Temperature

With increase in temperature, electronic conductivity decreases because the arrangement of electrons gets disturbed. Metallic conductivity does not affect the structure of the metal.