Which of the following energy band diagrams shows the $N-$ type semiconductor?

Which of the following statements is incorrect?

The electronic configuration of germanium is $2, 8, 18, 4$. To make it an extrinsic semiconductor,a small quantity of antimony is added. What is the nature of the resulting material?

Write briefly on $n$-type and $p$-type semiconductors.

Pure Silicon crystal at $300 \ K$ has equal electron and hole concentration of $1.5 \times 10^{16} \ m^{-3}$. Doping by indium increases $n_h = 4.5 \times 10^{22} \ m^{-3}$. The $n_e$ in the doped silicon is:

In a $p-$type semiconductor, which of the following statements is true?