The effect of an increase in temperature on t | vedclass

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(C) In a semiconductor,as the temperature increases,the thermal energy provided to the electrons increases. This allows more electrons to overcome the

Vedclass · Accepted Answer

$n_e$ increases,resistance decreases

Vedclass · Answer

(C) In a semiconductor,as the temperature increases,the thermal energy provided to the electrons increases. This allows more electrons to overcome the energy band gap and jump from the valence band to the conduction band. Consequently,the number of electrons in the conduction band $(n_e)$ increases. Since the conductivity of a semiconductor is directly proportional to the number of charge carriers,the conductivity increases. Because resistance is inversely proportional to conductivity,the resistance of the semiconductor decreases.

The effect of an increase in temperature on the number of electrons in the conduction band $(n_e)$ and the resistance of a semiconductor will be as follows:

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