List of practice Questions

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.

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 \(0.85m_e\))

Which of the following is true for hard magnetic materials:

Antiferromagnetic materials have magnetic susceptibility in the range:

Domain theory explains:

What is the effect of temperature on magnetic susceptibility of ferromagnetic materials?

Paramagnetic materials behaves as diamagnetic materials :

Which statements are true about wave propagation through a medium:
A. Frequency changes in a non-linear medium but remains constant in a linear medium.
B. Frequency changes in a linear medium but remains constant in a non-linear medium.
C. R + T = 1, where R is the reflection coefficient and T is the transmission coefficient
D. R + T $>$ 1, where R is the reflection coefficient and T is the transmission coefficient
Choose the correct answer from the options given below:

Which statements are true for total internal reflection?
A. The angle of incidence must be greater than the critical angle
B. light goes from an optically denser medium to an optically rarer medium.
C. light goes from an optically rarer medium to an optically denser medium.
D. The critical angle depends on the refractive index of both media.
Choose the correct answer from the options given below:

Which of the following option is correct related to the application of elastic hysteresis?

The elastic energy density of a stretched wire is given by:

Under the elastic limit, Poisson's ratio is:

The breaking stress of a wire depends on:

The ideal gas, which is a model for gas used in constant volume gas thermometers, for which P = \(\rho\)RT. This equation illustrates that there are only ______________________ independent intensive thermodynamic properties for a simple fluid.

The speed of sound in a fluid is the velocity at which a weak pressure wave propagates in the medium.

Match the LIST-I with LIST-II
\begin{tabular}{|l|l|} \hline LIST-I & LIST-II
\hline A. If heat is added to the system & I. \(Q<0\)
B. If heat is removed from the system & II. \(W>0\)
C. If work is done on the system & III. \(Q>0\)
D. If work is done by the system & IV. \(W<0\)
\hline \end{tabular}
Choose the correct answer from the options given below:

Choose the correct sequence of operations in the Carnot cycle.
A. Isothermal expansion of gas.
B. Isothermal compression of gas.
C. Adiabatic compression of gas.
D. Adiabatic expansion of gas.
Choose the correct answer from the options given below:

How does the gas constant R is related to the universal gas constant \(\bar{R}\) and molecular mass M?

Select the correct sequence:
A. Zeroth law of thermodynamics
B. First law of thermodynamics
C. Second law of thermodynamics
D. Third law of thermodynamics
Choose the correct answer from the options given below:

Which of the following are the correct statements about laws of thermodynamics:
A. The first law does not indicate the direction in which the change can occur.
B. The first law indicates the direction in which the change can occur.
C. The second law does not indicate the direction in which the change occurs.
D. The second law indicates the direction in which the change can occur.
Choose the correct answer from the options given below:

According to the Entropy hypothesis, which one of the following statements is correct:

The value of specific heat at constant volume (\(C_V\)) for diatomic molecules is: