Question
Physics Question on band theory of solids
An n-type semiconductor is
A
neutral
B
positively charged
C
negatively charged
D
negatively or positively charged depending on the amount of impurity added
Answer
neutral
Explanation
Solution
The n-type semiconductor has excess of free electrons for conduction. These electrons are unbound. Since, the total number of electrons in an atom is equal to the total number of protons in the nucleus. So, n-type semiconductor is neutral.