Verified Solution • 2025–26 Session moderate

QPage 418: Q5: HC Verma: Concepts of Physics - Volume 2 Semiconductors and Semiconductor Devices Page 418: Q5 Solution: The electrical conductivity of pure germanium can be increased by

⚠️ Common Exam Traps & Conceptual Pitfalls

In semiconductors, σ rises with temperature because the intrinsic carrier concentration increases, contrary to metals where scattering dominates. Thus, heating, donor or acceptor doping, and UV illumination all raise conductivity by generating more carriers.

The electrical conductivity of pure germanium can be increased by

Multiple Choice Options

  • A increasing the temperature
  • B doping acceptor impurities
  • C doping donor impurities
  • D irradiating ultraviolet light on it.

Step-by-Step Verified Solution

**Answer:** (a), (b), (c), (d). **Step-by-Step Explanation:** All these methods increase the electrical conductivity of pure germanium.

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