9) Which of the following statements is correct? A) The increase in electrical conductivity of a semiconductor is due to an increase in the mean free time between collisions. B) The conductivity of a semiconductor is temperature dependent since increasing the temperature increase the number of electron-hole pairs. C) The conductivity of a semiconductor increases with temperature because of greater number of electrons and holes moving in the same direction under an applied field. D) The conductivity of most metals decrease with temperature since more electron-hole pairs are created with decreasing temperature.
9) Which of the following statements is correct? A) The increase in electrical conductivity of a semiconductor is due to an increase in the mean free time between collisions. B) The conductivity of a semiconductor is temperature dependent since increasing the temperature increase the number of electron-hole pairs. C) The conductivity of a semiconductor increases with temperature because of greater number of electrons and holes moving in the same direction under an applied field. D) The conductivity of most metals decrease with temperature since more electron-hole pairs are created with decreasing temperature.
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Transcribed Image Text:9) Which of the following statements is correct?
A) The increase in electrical conductivity of a semiconductor is due to an increase in the mean free
time between collisions.
B) The conductivity of a semiconductor is temperature dependent since increasing the temperature
increase the number of electron-hole pairs.
C) The conductivity of a semiconductor increases with temperature because of greater number of
electrons and holes moving in the same direction under an applied field.
D) The conductivity of most metals decrease with temperature since more electron-hole pairs are
created with decreasing temperature.
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