Question
Physics Question on Semiconductor electronics: materials, devices and simple circuits
In a semiconductor, the conductivity increases with the increase in temperature due to
A
increase in relaxation time
B
decrease in the number density of current carriers
C
decrease in both the number density of current carriers and relaxation time
D
increase in the number density of current carriers and decrease in the relaxation time
Answer
increase in the number density of current carriers and decrease in the relaxation time
Explanation
Solution
Bond breaks due to increase in temperature. Thus, density of electrons and holes increases. Relaxation time decreases due to rapid collisions