JEE PHYSICS MCQ: SEMI CONDUCTOR DEVICES

1 Easy

1 of 1

Understanding +4 | -1

If a LED forward biased, then

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Correct option: A

electrons from the

n

- type side cross the

p-n

junction and recombine with holes in the

p

- type side

Option A (electrons from the

n

- type side cross the

p-n

junction and recombine with holes in the

p

- type side) is correct because in forward bias, electrons move from the n-side to the p-side and recombine with holes, leading to light emission in an LED.

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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