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Q.

When NPN transistor is used as an amplifier

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a

electrons move from base to collector

b

holes move from emitter to base

c

electrons move from collector to base

d

holes move from base to emitter

answer is A.

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Detailed Solution

When NPN transistor is used as an amplifier majority charge carriers, i.e., electrons of /f-type emitter move from emitter to base and then from base to collector.
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