List of top Material Science and Technology Questions

Match the LIST-I with LIST-II

LIST-I	LIST-II
A. Field emission	I. detector of gases
B. Chemical sensor	II. strength of plastic composites
C. Mechanical Reinforcement	III. serve as heat sink
D. Computer	IV. flat panel display

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Match the LIST-I with LIST-II

LIST-I (Quantum structures)	LIST-II (Delocalization dimensions)
A. Bulk conductor	I. 0
B. Quantum well	II. 3
C. Quantum wire	III. 1
D. Quantum dot	IV. 2

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Match the LIST-I with LIST-II

LIST-I	LIST-II
A. Brillouin Zone	Provides the understanding of the origin of allowed and forbidden bands in solids.
B. Extended Zone Scheme	The electrons in a crystal behave like free electrons for most of the \( k \) values except when it approaches \( n\pi/a \).
C. Periodic Zone Scheme	The E-k curve for several values of \( n \) reduced into the first zone for a simple cubic lattice with vanishing potential.
D. Reduced Zone Scheme	The E-K curve is not continuous and has discontinuities at \( k = \pm n\pi/a \), where \( n=1,2,3,\dots \).

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Match the LIST-I with LIST-II

LIST-I	LIST-II
A. Mobility of electrons (\(\mu\))	I. \( Ne^2\tau/m \)
B. Drift velocity of electrons (\(v_d\))	II. \( \mu E \)
C. Electrical conductivity of conduction electrons (\(\sigma\))	III. \( \mu m/e \)
D. Relaxation time of electrons (\(\tau\))	IV. \( 1/\rho ne \)

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Match the LIST-I with LIST-II

LIST-I (Aberrations)	LIST-II (Consequences)
A. Spherical aberration	I. image of a point object as a disc
B. Coma	II. spreading of the image along the principal axis
C. Astigmatism	III. Line object is not imaged into a line
D. Distortion	IV. Image of a point object is a blurred surface

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Match the LIST-I with LIST-II

LIST-I (Thermal Process)	LIST-II (Statement)
A. Isothermal process	I. Which occurs at constant volume
B. Adiabatic Process	II. Which occurs at constant pressure
C. Isobaric Process	III. Which occurs at constant temperature
D. Isochoric process	IV. No heat transfer during the thermodynamic process

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Match the LIST-I with LIST-II

LIST-I (Basic Laws)	LIST-II (Properties)
A. First Law of Thermodynamics	I. Concept of temperature
B. Second Law of Thermodynamics	II. Concept of internal energy
C. Third Law of Thermodynamics	III. Concept of entropy
D. Zeroth Law of Thermodynamics	IV. Nernst Theorem

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Match the LIST-I with LIST-II

LIST-I (Bonds)	LIST-II (Formations)
A. Ionic Bonds	Actual transfer of electrons from one atom to another atom
B. Metallic Bonds	Partial sharing of valence electrons by the neighboring atoms
C. Van der Waals Bonds	This type of bonding arises from dipolar interaction of crystals/molecules of the crystal.
D. Hydrogen Bonds	This type of interaction between the oppositely charged ends of permanently polarized molecules.

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Match the LIST-I with LIST-II

LIST-I (Parameters)	LIST-II (Expressions)
A. Potential energy of a system of two atoms	I. \( \alpha = \sum_{j} \pm \frac{1}{p_{ij}} \)
B. Madelung constant	II. \( U_{ij} = \pm \frac{q^2}{r} \)
C. Coulomb electrostatic energy	III. \( U = -\frac{A}{r^2} + \frac{B}{r^{10}} \)
D. Cohesive energy	IV. \( U_{ij} = \lambda e^{-r_{ij}/\rho} \pm \frac{q^2}{r_{ij}} \)

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