Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-diagram based-Hard-Class 12
Consider a diagram representing a p-type semiconductor material where a trivalent acceptor atom is doped in a tetravalent Si or Ge lattice. Which of the following correctly describes the structure and charge distribution shown in the diagram?
A
The trivalent atom forms covalent bonds with three Si atoms, leaving one hole.
B
The trivalent atom forms covalent bonds with four Si atoms, resulting in no holes.
C
The trivalent atom donates an electron, creating an electron excess in the lattice.
D
The trivalent atom results in two holes due to double-bond formation with Si.
Correct Answer
Option A
Detailed Explanation
The trivalent dopant has one less valence electron, forming bonds with three Si atoms and leaving a hole with the fourth as shown in Fig. 14.8.
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