Verified Solution • 2025–26 Session moderate

QPages 416-417: Q7: HC Verma: Concepts of Physics - Volume 2 Semiconductors and Semiconductor Devices Pages 416-417: Q7 Solution: We have valence electrons and conduction electrons in a…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students frequently assume that a missing electron in the conduction band creates a “conduction hole,” but holes are defined only as vacancies in a *filled* band. Since the conduction band is essentially empty in equilibrium, there is no background of electrons to leave a vacancy, so holes exist solely in the valence band.

We have valence electrons and conduction electrons in a semiconductor. Do we also have 'valence holes' and 'conduction holes'?

Step-by-Step Verified Solution

**Answer:** No, we do not have 'valence holes' and 'conduction holes'. Holes exist only in the valence band. **Step-by-Step Explanation:** A hole is the absence of an electron in the valence band. When an electron is excited to the conduction band, it leaves behind a hole in the valence band. The conduction band contains free electrons but no holes. Hence, holes are exclusively a valence-band phenomenon .

All Questions in this Chapter

QPage 418: Q1 QPage 418: Q2 QPage 418: Q3 QPage 418: Q4 QPage 418: Q5 QPage 418: Q6 QPage 418: Q7 QPage 418: Q8 QPage 418: Q9 QPage 418: Q10 QPages 416-417: Q1 QPages 416-417: Q2 QPages 416-417: Q3 QPages 416-417: Q4 QPages 416-417: Q5 QPages 416-417: Q6 QPages 416-417: Q7 QPages 416-417: Q8 QPages 416-417: Q9 QPages 416-417: Q10 QPages 416-417: Q11 QPages 417-418: Q1 QPages 417-418: Q2 QPages 417-418: Q3 QPages 417-418: Q4 QPages 417-418: Q5 QPages 417-418: Q6 QPages 417-418: Q7 QPages 417-418: Q8 QPages 417-418: Q9 QPages 417-418: Q10 QPages 417-418: Q11 QPages 417-418: Q12 QPages 417-418: Q13 QPages 417-418: Q14 QPages 417-418: Q15 QPages 419-421: Q1 QPages 419-421: Q2 QPages 419-421: Q3 QPages 419-421: Q4 QPages 419-421: Q5 QPages 419-421: Q6 QPages 419-421: Q7 QPages 419-421: Q8 QPages 419-421: Q9 QPages 419-421: Q10 QPages 419-421: Q11 QPages 419-421: Q12 QPages 419-421: Q13 QPages 419-421: Q14 QPages 419-421: Q15 QPages 419-421: Q16 QPages 419-421: Q17 QPages 419-421: Q18 QPages 419-421: Q19 QPages 419-421: Q20 QPages 419-421: Q21 QPages 419-421: Q22 QPages 419-421: Q23 QPages 419-421: Q24 QPages 419-421: Q25 QPages 419-421: Q26 QPages 419-421: Q27 QPages 419-421: Q28 QPages 419-421: Q29 QPages 419-421: Q30 QPages 419-421: Q31 QPages 419-421: Q32 QPages 419-421: Q33.1 QPages 419-421: Q33.2 QPages 419-421: Q33.3 QPages 419-421: Q34 QPages 419-421: Q35

Related Learning Resources & Exam Preparation

Chapter Practice Bank
Practice all topic-wise questions from Semiconductors and Semiconductor Devices
Reference Textbook Solutions
Explore complete chapter exercises for HC Verma: Concepts of Physics - Volume 2
Competitive PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring