Question

Hole in semiconductor is(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

Answer 1

(b) a vacancy created when an electron leaves a covalent bond

Answer 2

Answer is (b) a vacancy created when an electron leaves a covalent bond.

Because- anti particle of electron is positron ( i.e. e+ ), there is no presence of free electron in semiconductor and hole is not created. It is just the absence created when an electron jumps to the conduction band from the valence band leaving an empty spot in the semiconductor. Electron breaks the covalent bond and a blank is created which is called hole.