Q. 2

In a p-n junction A. there is not systematic motion of charge carriers

A. holes and conduction electrons systematically go from the p-side to the n-side and from the n-side to the p-side respectively.

C. there is not net charge transfer between the two sides

D. there is a constant electric field near the junction.

Answer :

For A.) and B.)


Diffusion of the electrons and holes from n and p side to p and n side, respectively, due to higher a concentration of holes on the p-side and lower at n-side and vice-versa for electrons results in systematic motion of charges take place.


Therefore, option A is incorrect and B is correct.


C.) Since, there are same number of electrons transferred as the number of holes transferred. Thus, the net charge transferred is zero.


Therefore, the option C is correct.


D.) As the During equilibrium there is no flow of charges at junction therefore the electric field there remains constant.


Therefore, the option D is correct.

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