The effect of an increase in temperature on t | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(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:

Similar Questions

At absolute zero,$Si$ acts as

The energy band gap of $Si$ is ........ $eV$.

The energy required for an electron to jump the forbidden band for germanium at room temperature is $........... eV$.

$A$ copper strip and a germanium strip are cooled to $80 \ K$ from room temperature. The resistance of:

Give a classification of semiconductors and write examples of each.

Vedclass Test Series

Exam Paper Generator

Online Exam Module