question_answer

What is the name of the level formed due to impurity atom in p-type in the forbidden gap?

A)  Donor level                       

B)  Acceptor level

C)  Conduction level                            

D)  Forbidden level

Correct Answer: B

Solution :

                In p-type doping, the impurities have left holes in the atomic structure which tend to attract and hold free electrons. This pulls the Fermi level down until it gets close to the valence bond. Hence, name of level formed due to impurity atom is p-type in the forbidden gap is acceptor level.