Verified Solution • 2025–26 Session moderate

QPage 418: Q8: HC Verma: Concepts of Physics - Volume 2 Semiconductors and Semiconductor Devices Page 418: Q8 Solution: Let , and represent the emitter current, the collector current…

⚠️ Common Exam Traps & Conceptual Pitfalls

Remember that the emitter current equals the sum of collector and base currents, $i_E=i_C+i_B$. Because the current gain $eta$ is large, $i_B$ is much smaller than $i_C$ and $i_E$, so $i_C$ is only slightly less than $i_E$. Students often mistakenly think $i_C$ could exceed $i_E$ or that $i_B$ is comparable to $i_E$; avoid this by applying the current equation and noting $etagg1$.

Let

i_E

,

i_C

and

i_B

represent the emitter current, the collector current and the base current respectively in a transistor. Then

Multiple Choice Options

A $i_C$ is slightly smaller than $i_E$
B $i_C$ is slightly greater than $i_E$
C $i_B$ is much smaller than $i_E$
D $i_B$ is much greater than $i_E$ .

Step-by-Step Verified Solution

**Answer:** (a), (c). **Step-by-Step Explanation:** i_C is slightly smaller than i_E (a). i_B is much smaller than i_E (c).

All Questions in this Chapter

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