Question

Hole is ______.

पर्याय

• an anti-particle of electron.

• a vacancy created when an electron leaves a covalent bond.

• absence of free electrons.

• an artifically created particle.

Answer 1

Hole is a vacancy created when an electron leaves a covalent bond.

Explanation:

Concept of holes in the semiconductor:

1. 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 carrier.
2. A hole is considered a seat of positive charge, having a magnitude of charge equal to that of an electron.
3. Holes act as a virtual charge, although there is no physical charge on them.
4. The effective mass of a hole is more than an electron.
5. The mobility of a hole is less than an electron.