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QPages 417-418: Q6: HC Verma: Concepts of Physics - Volume 2 Semiconductors and Semiconductor Devices Pages 417-418: Q6 Solution: When an impurity is doped into an intrinsic semiconductor, the…
⚠️ Common Exam Traps & Conceptual Pitfalls
Students often confuse the slight decrease in intrinsic carrier concentration ($n_i$) due to the mass action law with the total carrier density, failing to recognize that the massive increase in majority carriers from dopants dominates the conductivity equation $\sigma = nq\mu$.
When an impurity is doped into an intrinsic semiconductor, the conductivity of the semiconductor
Multiple Choice Options
- A increases
- B decreases
- C remains the same
- D become zero.
Step-by-Step Verified Solution
**Answer:** (a) increases.
**Step-by-Step Explanation:**
Doping increases the number of charge carriers, increasing conductivity.
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