012the electrical conductivity of metals decrease with rise in tempera

1.	012the electrical conductivity of metals decrease with rise in temperature while that ofsemiconductor increase. Explain.
Answer» METALSAs the temperature increases, the molecular vibrations increase (in turn decreasing the mean free path of molecules). So, they obstruct the flow of free electrons, thus reducing the conductivity.SEMI-CONDUCTORSAs the temperature increases, the atoms in the material (both metal and semiconductors) vibrate more and more and scatter the free carriers more and decrease the mobility. The decrease in mobility is not as much as the increase in the density in the case of a semiconductor. So its conductivity increases. right answer bhai ji

012the electrical conductivity of metals decrease with rise in temperature while that ofsemiconductor increase. Explain.

Answer»

METALSAs the temperature increases, the molecular vibrations increase (in turn decreasing the mean free path of molecules). So, they obstruct the flow of free electrons, thus reducing the conductivity.SEMI-CONDUCTORSAs the temperature increases, the atoms in the material (both metal and semiconductors) vibrate more and more and scatter the free carriers more and decrease the mobility. The decrease in mobility is not as much as the increase in the density in the case of a semiconductor. So its conductivity increases.

right answer bhai ji

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