A) There are no free electrons at 0 K
B) There are no free electrons at room temperature
C) The number of free electrons increases with rise of temperature
D) The charge carriers are electrons and holes.
Correct Answer: B
Solution :
M. In semiconductor, no covalent bond breaks at 0 K, so, no electron is free at 0 1 K. At room temperature some covalent bonds break, so, some electrons and holes become free. More covalent bonds break at high temperature and so, number of free electrons increases at high temperature.
You need to login to perform this action.
You will be redirected in
3 sec
