In a transistor the width of

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Emitter and base regions are equal

Emitter and collector regions are equal

Emitter region is slightly more than that of collector region

Collector region is slightly more than emitter region

answer is B.

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Detailed Solution

Its primary purpose is to gather the majority of charge carriers arriving from the emitter and passing through the base, as implied by its name.
Because the collector region must dissipate significantly more power than the emitter region in most transistors, it is physically larger.

Hence the correct answer is Collector region is slightly more than emitter region.

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