CUET · PHYSICS · PYQ PAPER 2025
To form n-type semiconductor from a pure semiconductor, the impurity to be added is
- A Aluminium
- B Boron
- C Indium
- D Arsenic
Answer & Solution
Correct Answer
(D) Arsenic
Step-by-step Solution
Detailed explanation
To form an n-type semiconductor, a pure semiconductor (like Silicon or Germanium) must be doped with a pentavalent impurity (elements with 5 valence electrons). Arsenic has 5 valence electrons, providing an extra "free" electron for conduction. In contrast, Aluminium, Boron, and…
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