Question

For semiconductors, the major factor affecting the value of resistivity when temperature changes is

• A.
• B. e: the charge of an electron
• C. m: the mass of an electron
• D. n: the number of free electrons per unit volume

Answer 1

The correct option is D

n: the number of free electrons per unit volume

n increases with temperature and this increase more than compensates any decrease in relaxation time. Hence, for semiconductors resistivity decreases with the increase in temperature.