JEE PHYSICS MCQ: SEMI CONDUCTOR DEVICES

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In a transistor the base is made very thin and is lightly doped with an impurity because –

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Correct option: A

to enable the collector to collect 95% of the holes or electrons coming from the emitter side

Option A (to enable the collector to collect 95% of the holes or electrons coming from the emitter side) is correct because a thin, lightly doped base allows most carriers from the emitter to reach the collector.

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A PN-junction has a thickness of the order of In a

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P

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\mathrm{\alpha\; and\; \beta }

of a transistor