Semiconductors Question 9
Question 9 - 31 January - Shift 1
The effect of increase in temperature on the number of electrons in conduction band $(n_e)$ and resistance of a semiconductor will be as:
(1) Both $n_e$ and resistance decrease
(2) Both $n_e$ and resistance increase
(3) $n_e$ increases, resistance decreases
(4) $n_e$ decreases, resistance increases
Show Answer
Answer: (3)
Solution:
Formula: Intrinsic semiconductor
As temperature increases, more electron excite to conduction band and hence conductivity increases, therefore resistance decreases.
