List of top Material Science and Technology Questions on Solid State Physics, Devices, Electronics asked in CUET (PG)

For isothermal expansion of an ideal gas, which of the following statements are correct?
A. The change in internal energy is zero,
B. The work done is zero,
C. The heat is released by gas,
D. The heat is absorbed by gas.

Which of the following statements are correct at \(T=0\ \text{K}\)?
A. Fermi function is a step function,
B. Chemical potential is equal to Fermi energy,
C. Chemical potential is equal to half of Fermi energy.

Which of the following statements are correct?
A. Defects in solids can affect the electrical property,
B. Defects in solids can affect the optical property,
C. Defects cannot be created by any technique,
D. Defects can be removed permanently with any technique.

Which of the following can be determined by Hall effect?
A. The electron specific heat at constant volume per electron,
B. The sign of the current carrying charges,
C. The temperature of a rectangular metal slab,
D. The charge density, E. The mobility of the charge carriers.

Which of the following statements are correct for curves on \(T-S\) diagram?
A. The slope of an isochoric curve on \(T-S\) diagram is \(\frac{C_V}{T}\),
B. The slope of an isochoric curve on \(T-S\) diagram is \(\frac{T}{C_V}\),
C. The slope of an isobaric curve on \(T-S\) diagram is \(\frac{T}{C_P}\),
D. The slope of an isobaric curve on \(T-S\) diagram is \(C_P\), E. An isochoric curve has a greater slope than an isobaric curve on \(T-S\) diagram.

Arrange the following thin film deposition techniques in increasing order of their deposition rate:
A. Pulse laser deposition,
B. rf Sputtering,
C. Thin film deposition by thermal evaporation,
D. Spin coating.

Arrange the following dispersion graphs in decreasing order of their corresponding density of states.

Which of the following are applications of nanomaterials?
A. Catalysts,
B. Polarizer,
C. Coatings for anticorrosion protection,
D. Fluorescent, E. Drug delivery.

Which of the following statement/s regarding polarization in materials is/are correct?
A. Piezoelectricity and pyroelectricity are inherent property of crystals.
B. The electric moment is inversely proportional to the electric fiel
D.
C. Above the Curie temperature, the dielectric constant is inversely proportional to \((T-T_c)\) in ferroelectrics.

Arrange the following dispersion graphs in decreasing order of their corresponding effective electron mass.

Arrange the following steps of sol-gel method in correct order:
A. Gelation,
B. Hydrolysis,
C. Sintering,
D. Drying.

In a crystal, the value of Madelung constant does not depend upon which of the following:

The drift velocity of the electrons is given by, where \(n\) is number of electrons per unit volume, \(I\) is the current, \(e\) is charge on electron and \(A\) is area:

For an ideal hcp structure, where the atomic spheres touch each other, the ratio of \(\dfrac{c}{a}\) is:

The magnitude of the reciprocal lattice vector is related to interplaner spacing \(d_{hkl}\):

The reciprocal lattice for a body centered cubic crystal is:

The density of zinc is \(7.13 \times 10^3\) kg/m\(^3\) and its atomic weight is 65.4. The fermi energy of Zinc is:
(Given that the effective mass of the electron in zinc is \(0.85m_e\))

In 3-dimensional system, the mean energy of an electron in electron gas at absolute zero is __________________________ of fermi energy, \(E_f(0)\) at absolute zero.

Which of the following statements are correct for the Sommerfeld model:
A. The free electrons are valence electrons of the composing atoms.
B. The potential energy of an electron at rest inside the metal is assumed to be higher than that of an electron outside the metal.
C. In this model, the mutual repulsion between the electrons is neglected.
D. The potential energy for an electron is periodic.
Choose the correct answer from the options given below:

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): In the absence of an electric field, the electron gas is in an equilibrium state described by equilibrium distribution functions, viz the fermi-Dirac distribution function for a degenerate electron gas and Maxwell-Boltzmann distribution function for a non-degenerate electron gas.
Reason (R): In a conductor, the number of electrons moving in opposite directions is always the same, their average velocity in any direction is zero and consequently, the distribution functions are symmetric about the axis of ordinates.
In light of the above statements, choose the correct answer from the options given below.