A) high temperature
B) room temperature
C) low temperature
D) none of the above
Correct Answer: B
Solution :
Key Idea: At room temperature some valence electrons acquire thermal energy to go to conduction band. A semiconductor is a material with an electrical conductivity that is intermediate between that of an insulator and a conductor. In a semiconductor at room temperature, some of the valence electrons acquire thermal energy greater than band gap energy \[{{E}_{g}}\] and cross over into the conduction band. These free electrons, and the (positive) holes created in the valence band, can move about even under a small applied field. The solid is therefore slightly conducting. The conductivity further increases with increasing temperature.You need to login to perform this action.
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