Question

if an electric field is applied to an n type semiconductor bar the electrons and holes move in opposite directions due to their opposite directions the net current is

Answer 1

means it is a type of reverse wiasing so it oppose electric field

Answer 2

Answer:

The absence of an electron in the valence band, or an empty electron energy level in the valence band, of a semiconductor is called a hole.

(2) With an empty energy state available in an otherwise filled valence band, a valence electron of a neighbouring atom breaks its covalent bond by absorbing thermal energy and occupies this hole.

(3) This leaves a hole in its initial position, as if the

hole has effectively moved in the direction opposite to that of the electron.

(4) This new hole is subsequently filled by an electron from another neighbouring covalent bond and the hole moves further in the direction opposite to that of an electron. Thus, motion of electrons in one direction is equivalent to motion of holes in the opposite direction. •