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Chapter 4: Problem 1

What are the majority carriers in the base region of an npn transistor called?

Short Answer

Expert verified
The majority carriers in the base region of an npn transistor are called holes.

Step by step solution

01

Understanding the npn transistor

Npn transistor is a semiconductor device consisting of three layers - an n-type layer (Emitter), a p-type layer (Base), and another n-type layer (Collector). The base region acts as a control region to regulate the flow of current from the emitter to the collector.
02

Knowing the majority carriers

In semiconductor devices, electrons and holes are the charge carriers. In an n-type semiconductor, electrons are the majority carriers, while in a p-type semiconductor, holes are the majority carriers.
03

Identifying the majority carriers in the base region of an npn transistor

Since the base region in an npn transistor is a p-type semiconductor, the majority carriers in this region are holes. In the npn transistor, these holes control the flow of electrons from the emitter to the collector.
04

Conclusion

The majority carriers in the base region of an npn transistor are called holes.

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Most popular questions from this chapter

If the base-emitter junction is open, the collector voltage is (a) \(V_{C E}\) (b) \(0 \mathrm{~V}\) (c) flowing (d) \(02 \mathrm{~V}\)

In a certain transistor circuit, the base current is 2 percent of the \(30 \mathrm{~mA}\) emitter current. Determine the collector current.

Why is the base current in e transistor so much less than the collector current?

In saturation, \(V_{C}\) is (a) \(0.7 \mathrm{~V} \quad\) (b) equal to \(V_{c c}\) (c) minimuim (d) maximum

A certain transistor exhibits an \(\alpha_{\text {oc }}\) of \(0.90\). Determine \(l_{\mathrm{c}}\) when \(I_{\mathrm{h}}=935 \mathrm{~mA}\).
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