Hole is: - Vidyadip

MCQ

Hole is:

A
An anti$-$particle of electron.
✓
A vacancy created when an electron leaves a covalent bond.
C
Absence of free electrons.
D
An artifically created particle.

✓

Answer

Correct option: B.

A vacancy created when an electron leaves a covalent bond.

Concept of holes in the semiconductor:
When an electron is removed from a covalent bond, it leaves a vacancy behind. An electron from a neighbouring atom can move into this vacancy, leaving the neighbour with a vacancy. In this way the vacancy formed is called a hole $($or cotter$)$, and can travel through the material and serve as an additional current carriers.
A hole is considered as a seat of positive charge, having magnitude of charge equal to that of an electron.
Holes acts as a virtual charge, although there is no physical charge on it.
Effective mass of hole is more than an electron.
Mobility of hole is less than an electron.

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