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When n-p-n transistor is used as an amplifier, then (a) electrons move from collector to base (b) holes move from base to emitter

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When n-p-n transistor is used as an amplifier, then 

(a) electrons move from collector to base 

(b) holes move from base to emitter

(c) electrons move from base to collector 

(d) electrons move from emitter to base

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(c) electrons move from base to collector

When n-p-n transistor is used an amplifier, the majority carrier electrons move from base to collector.

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