List of top Material Science and Technology Questions on Solid State Physics, Devices, Electronics

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?
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 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.

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 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.

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.

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:

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

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

In which type of metals, there is overlapping of valence band with the conduction band?

The electronic contribution of specific heat of copper at 300K is:
(Given that the fermi energy of copper is 7.05eV, and it is assumed to be temperature independent)

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 \(0.85m_e\))

According to Weidemann-Franz-Lorentz Law, the theoretical value of Lorentz number (L) for metals is:

For temperature greater than 0 K, the fermi level is the level where the probability of occupation of electrons is:

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

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.