JEE PHYSICS MCQ: SEMI CONDUCTOR DEVICES

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Which of the following statements is true for an

n

-type semiconductor?

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Correct option: A

The donor level lies closely below the bottom of the conduction band.

Option A (The donor level lies closely below the bottom of the conduction band) is correct because in an n-type semiconductor, donor impurities create energy levels just below the conduction band, allowing electrons to easily move into the conduction band.

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

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transistor the base is the

N

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P

-region is A solid reflects incident light and its electrical conductivity decreases with temperature. The binding in this solid is An alternating current can be converted into direct current by a A N–P–N transistor is used in inverse active mode of operation then its emitter base junction should be in In the case of constants

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

of a transistor