JEE PHYSICS MCQ: SEMI CONDUCTOR DEVICES

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In a cubic unit cell of bcc structure, the lattice points (

ie

, number of atoms) are

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Correct option: A

Option A (2) is correct because a body-centered cubic (bcc) unit cell has atoms at each of the 8 corners (each contributing 1/8) and one atom at the center, totaling 2 atoms per unit cell.

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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