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When an n–p–n transistor is used as an amplifier then

1. the electrons flow from emitter to collector
2. the holes flow from emitter to collector
3. the electrons flow from collector to emitter
4. the electrons flow from battery to emitter

Correct answer: the electrons flow from emitter to collector

Solution

In an n-p-n transistor, the majority charge carriers are electrons. During amplification, electrons flow from the emitter to the collector through the base region.

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