A) an anti-particle of electron.
B) a vacancy created when an electron leaves a covalent bond.
C) absence of free electrons.
D) an artificially created particle.
Correct Answer: B
Solution :
Option [b] is correct. Explanation: Atoms of semiconductor are binding by covalent bonds between the atoms of same or different type. Due to thermal agitation when an electron leaves its position and become free, it leaves a vacancy of electron and this vacancy in the bond (covalent) is called hole.
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