When Ge is doped with pentavalent impurity, the energy required to free…

When Ge is doped with pentavalent impurity, the energy required to free the weakly bound electron from the dopant is about

(A) 0.001 eV
(B) 0.01 eV
(C) 0.72 eV
(D) 1.1 eV

Ans. The correct answer is approximately 0.045 eV, which is not directly listed among the options provided. Therefore, none of the options presented accurately represents the typical energy required to free the weakly bound electron from the dopant in germanium doped with a pentavalent impurity like phosphorus.