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Chapter 20: Problem 46

Least doped region in a transistor (A) Either emitter or collector (B) Base (C) Emitter (D) Collector

Short Answer

Expert verified
The least doped region in a transistor is the Base. Therefore, the correct answer is (B) Base.

Step by step solution

01

Understanding Transistor Structure

A transistor is a semiconductor device that is used to amplify or switch electronic signals. It typically consists of three layers of semiconductor material: the emitter, base, and collector. The emitter is heavily doped to produce a high concentration of charge carriers, the base is lightly doped for very few charge carriers, and the collector is moderately doped to have a moderate concentration of charge carriers.
02

Identifying the Doping Levels

In a transistor, the doping level determines the concentration of charge carriers in each region. Here is the doping level for each region: 1. Emitter: Heavily doped (high concentration of charge carriers) 2. Base: Lightly doped (low concentration of charge carriers) 3. Collector: Moderately doped (moderate concentration of charge carriers)
03

Finding the Least Doped Region

To find the least doped region in a transistor, we'll compare the doping levels of each region. From the levels specified above, the base has the lightest doping (least concentration of charge carriers).
04

Answer

Based on the analysis, the least doped region in a transistor is the Base. So, the correct answer is (B) Base.

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Most popular questions from this chapter

For a transistor amplifier in common emitter configuration for load impedance of \(1 k \Omega\left(h_{f e}=50\right)\) and ( \(\left.h_{\text {oe }}=25 \mu \mathrm{A} / \mathrm{V}\right)\), the current gain is [2004] (A) \(-5.2\) (B) \(-15.7\) (C) \(-24.8\) (D) \(-48.78\)

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When the \(P\) end of \(P-N\) junction is connected to the negative terminal of the battery and the \(N\) end to the positive terminal of the battery, then the \(P-N\) junction behaves like (A) A conductor (B) An insulator (C) A super-conductor (D) A semi-conductor
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