Question
Physics Question on Semiconductor electronics: materials, devices and simple circuits
The effect of increase in temperature on the number of electrons in conduction band (ne) and resistance of a semiconductor will be as:
A
ne decreases, resistance increases
B
Both ne and resistance increase
C
ne increases, resistance decreases
D
Both ne and resistance decrease
Answer
ne increases, resistance decreases
Explanation
Solution
As temperature increases, more electron excite to conduction band and hence conductivity increases, therefore resistance decreases.