Verified Solution • 2025–26 Session moderate

QPage 418: Q4: HC Verma: Concepts of Physics - Volume 2 Semiconductors and Semiconductor Devices Page 418: Q4 Solution: The impurity atoms with which pure silicon may be doped to make …

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often recall only boron as the p‑type dopant and ignore other trivalent impurities like aluminium, mistakenly classifying antimony (a group‑V element) as acceptor. Remember that any element with three valence electrons (group III) creates an acceptor level in silicon, so both B and Al produce p‑type material.

The impurity atoms with which pure silicon may be doped to make it a p-type semiconductor are those of

Multiple Choice Options

  • A phosphorus
  • B boron
  • C antimony
  • D aluminium.

Step-by-Step Verified Solution

**Answer:** (b), (d). **Step-by-Step Explanation:** Boron and aluminium are trivalent impurities that make silicon p-type.

All Questions in this Chapter

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