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Chapter 20: Problem 108

When \(n-p-n\) transistor is used as an amplifier (A) electrons move from base to collector. (B) holes move from collector to base. (C) electrons move from collector to base. (D) holes move from base to emitter.

Short Answer

Expert verified
The most appropriate answer is (A) electrons move from base to collector.

Step by step solution

01

Understanding transistor operation

In an \(n-p-n\) transistor, the emitter (n type) emits electrons and the collector (also n type) collects these electrons that have traversed through the base (p type). Therefore, the electrons move from emitter to collector in an \(n-p-n\) transistor.
02

Comparing the facts with the given options

By comparing the operating principle of the transistor with the given options, it is clear that none of the options state 'electrons move from emitter to collector'. However, remembering that in \(n-p-n\) operations, the emitter-base junction is forward biased and allows electron flow - electrons moves from the emitter (base of the n-region) into base (p-region). The base-collector junction is reverse-biased, allowing these electrons to move from the base to the collector (n-region), making option (A) the closest to the correct operation.

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