MCQ
For extrinsic semiconductors; when doping level is increased;
- AFermi-level of $p-$type semiconductor will go upward and Fermi-level of $n$ -type semiconductors will go downward.
- ✓Fermi-level of $p-$type semiconductors will go downward and Fermi-level of $n$ -type semiconductor will go upward.
- CFermi-level of both p-type and $n$ -type semiconductros will go upward for $T > T _{ F }$ $K$ and downward for $T < T _{ F } K ,$ where $T _{ F }$ is Fermi temperature.
- DFermi-level of $p$ and $n$ -type semiconductors will not be affected
