In a semiconductor, what is the vacancy left in a covalent bond by a missing electron called?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Hole
NCERT (2026-27):
Intrinsic Semiconductor – “… The thermal energy effectively ionises only a few atoms in the crystalline lattice and creates a vacancy in the bond …. The neighbourhood, from which the free electron (with charge –q) has come out leaves a vacancy with an effective charge (+q). This vacancy with the effective positive electronic charge is called a hole.”