Semiconductor Principles - Technical MCQs
Q1: When an electron jumps from the valence shell to the conduction band, it leaves a gap. What is this gap called?A
energy gap
B
hole
C
electron-hole pair
D
recombination
ANS:B - hole B is correct answer because free electrons are in conduction band. Electrons jump from valence band to conduction band leaving a gap in valence orbit called hole. The hole is the absence of an electron in valence band. Hole current occurs at the valence level. |
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