Verified Solution • 2025–26 Session moderate

QPage 418: Q2: HC Verma: Concepts of Physics - Volume 2 Semiconductors and Semiconductor Devices Page 418: Q2 Solution: In a p-n junction with open ends,

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often assume that an open-ended p‑n junction has no systematic carrier motion or electric field. In fact, diffusion of holes from the p‑side to the n‑side and electrons from the n‑side to the p‑side creates a depletion region, which in turn establishes a built‑in electric field that drives the systematic motion of carriers even without external bias.

In a p-n junction with open ends,

Multiple Choice Options

  • A there is no systematic motion of charge carries
  • B holes and conduction electrons systematically go from the p-side to n-side and from the n-side to p-side respectively
  • C there is no net charge transfer between the two sides
  • D there is a constant electric field near the junction.

Step-by-Step Verified Solution

**Answer:** (b), (d). **Step-by-Step Explanation:** Holes and electrons systematically move (b). There is a constant electric field near the junction (d).

All Questions in this Chapter

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