MATERIAL SCIENCE QUESTION PLEASE ANSWER CORRECTLY Calculate the position of Fermi level $E_F$ and the conductivity at $300K$ for

germanium crystal containing $5{10}^{22}$ arsenic atoms $\frac{?}{m^3}.$ Also calculate the

conductivity if the mobility of the electron is $0\mathrm{.}39m^2{V}^{-1}{S}^{-1}.$

$($Ans : $E_F$ is $0\mathrm{.}16eV$ below $E_c={3210}^{-1}{m}^{-1})$