JEE PHYSICS MCQ: SEMI CONDUCTOR DEVICES

1 Medium

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Metallic solids are always opaque because

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Correct option: B

Incident light is readily absorbed by the free electrons in a metal

Option B (Incident light is readily absorbed by the free electrons in a metal) is correct because metals have free electrons that can easily absorb photons of light, causing the light to be absorbed rather than transmitted.

More Questions from SEMI CONDUCTOR DEVICES

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

PNP

transistor the base is the

N

-region. Its width relative to the

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