When NPN transistor is used as an amplifier :

Electrons move from base to collector

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Holes move from emitter to base

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Electrons move from collector to base

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Holes move from base to emitter

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Solution

The correct option is A
Electrons move from base to collector

When NPN transistor is used as an amplifier, majority charge carrier electrons of N-type emitter move from emitter to base and then base to collector.

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When NPN transistor is used as an amplifier :

The correct option is A Electrons move from base to collector When NPN transistor is used as an amplifier, majority charge carrier electrons of N-type emitter move from emitter to base and then base to collector.

The correct option is A
Electrons move from base to collector

When NPN transistor is used as an amplifier, majority charge carrier electrons of N-type emitter move from emitter to base and then base to collector.