Electrical conductivity of a semiconductor:

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(B) In a semiconductor,the energy gap between the valence band and the conduction band is small. At absolute zero temperature $(T = 0 \ K)$,a semicond

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Increases with the rise in its temperature

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(B) In a semiconductor,the energy gap between the valence band and the conduction band is small. At absolute zero temperature $(T = 0 \ K)$,a semiconductor behaves as an insulator because there are no free electrons in the conduction band. As the temperature increases,thermal energy is provided to the electrons in the valence band,allowing them to jump into the conduction band. This process creates free electrons and holes,which act as charge carriers. Consequently,the number density of charge carriers increases significantly with temperature,leading to an increase in the electrical conductivity of the semiconductor.

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