Verified Solution • 2025–26 Session moderate

QPage 418: Q3: HC Verma: Concepts of Physics - Volume 2 Semiconductors and Semiconductor Devices Page 418: Q3 Solution: In a p-n junction,

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often assume that carrier generation and recombination are absent in the depletion region because it is void of free carriers; in reality thermal generation of electron‑hole pairs occurs everywhere in the crystal, and recombination also takes place (though at a lower rate). Remember that both processes coexist throughout the material, even within the depletion zone.

In a p-n junction,

Multiple Choice Options

  • A new holes and conduction electrons are produced continuously throughout the material
  • B new holes and conduction electrons are produced continuously throughout the material except in the depletion region
  • C holes and conduction electrons recombine continuously throughout the material
  • D holes and conduction electrons recombine continuously throughout the material except in the depletion region.

Step-by-Step Verified Solution

**Answer:** (a), (c). **Step-by-Step Explanation:** New holes and electrons are produced continuously throughout the material (a). Holes and electrons recombine continuously throughout the material (c).

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