Semiconducting Devices Question 147
Question: If $ N _{P} $ and $ N _{e} $ be the numbers of holes and conduction electrons in an extrinsic semiconductor, then
[MP PMT 1999; AMU 2001]
Options:
A) $ N _{P}>N _{e} $
B) $ N _{P}=N _{e} $
C) $ N _{P}<N _{e} $
D) $ N _{P}>N _{e} $ or $ N _{P}<N _{e} $ depending on the nature of impurity
Show Answer
Answer:
Correct Answer: D
Solution:
$ \begin{matrix} \text{Extrinsic} \ \text{S}\text{.C}\text{.} \ \end{matrix} $
$ \begin{matrix} P-\text{Type}(n _{p}»n _{e}) \ \begin{matrix} {} \ N-\text{Type}(n _{e}»n _{p}) \ \end{matrix} \ \end{matrix} $
