Question

if a semiconductor is heated what happens to the conductivity of the semiconductor. How does the number of electrons per unit volume in the semiconductor affected

Answer 1

The number of free electrons in a unit volume of the semi-conductor increases exponentially with an increase in the temperature. This more than compensates the small decrease in t, the relaxation time. Also, the temperature coefficient is negative. Thus the resistivity decreases with a temperature increase in semi-conductors.

Answer 2

$\huge\mathfrak{Answer}$

The conductivity of a semiconductor is inversely proportional to the temperature

Thus if the temperature is increased or it is heated then it's conductivity will decrease . The number of electrons per unit volume will decrease in speed or velocity