Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-diagram based-Medium-Class 12
Consider a semiconductor material doped with a trivalent impurity. Which characteristic correctly describes the structure shown in the diagram when a hole is created due to doping?
A
The dopant atom forms three covalent bonds with Si atoms, leaving a hole.
B
The dopant atom forms four covalent bonds with Si atoms, leaving an extra electron.
C
The dopant atom forms two covalent bonds with Si atoms, leaving two holes.
D
The dopant atom forms five covalent bonds with Si atoms, sharing electrons with extra atoms.
Correct Answer
Option A
Detailed Explanation
A trivalent impurity like Al can form three covalent bonds with Si atoms, creating a vacancy or hole in the fourth bond, as described in the NCERT context.
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