Question

How does conductivity of semi conductior vary with decrease in t emperature?

Answer 1

As the temperature of the semi-conductor is increased, the electrons in the valence band gain sufficient energy to escape from the confines of their atoms. As a result, in higher temperatures, asemi-conductor's valence electrons are free = conductionresults, resistivity decreases.

Answer 2

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• the conductivity of an intrinsic semiconductor increases with increase in temperature.
• The conductivity of an extrinsic semiconductors decreases with the increase in temperature, the number of majority carriers is nearly constant, but mobility decreases.
• Thus causes the conductivity to decrease.

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