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{"filename":"bsc-part-3-physics-308-2021.pdf","subject":"Physics","exam":"B.Sc. (Part III) Examination, 2021","sections":["First Section","Second Section","Third Section"]}

Questions:

  1. Our earth is an inertial frame, non-inertial frame, unaccelerated frame, or Galilean frame?
  2. Which is not an explicit function of time: velocity, acceleration, potential energy, or momentum?
  3. Newton's laws of motion are based on the assumption that space is homogeneous, isotropic, both, or invariant under rotation?
  4. One of the postulates of special theory of relativity is: Speed of light is relative, Speed of light is same in all inertial frames, Time is relative, or Mass is relative?
  5. Michelson-Morley experiment was performed to measure speed of light, prove existence of ether, measure speed of earth, or test the isotropy of space?
  6. A train of 100 m length when at rest is moving with a velocity of 0.8c. What is its length as seen by a stationary observer?
  7. What will be the mass of an electron moving with a velocity equivalent to times the velocity of light, given its rest mass is 9x10^-31 kg?
  8. The kinetic energy of a particle is double of its rest mass energy. Then what is the dynamic mass of the particle?
  9. What is the statistical mechanics in terms of microscopic and macroscopic systems?
  10. What is the probability of the sum being 7 or 11 when two dice are rolled?
  11. What is the probability of getting two heads and one tail in a large number of coin tosses?
  12. How is the phase space divided into cells, groups, subgroups, or sets?
  13. What is the thermodynamic probability of a system in equilibrium state?
  14. In a random distribution of 10 particles between two boxes with equal probability, what is the number of microstates in macrostate (3, 7)?
  15. How is probability expressed: as proportion, percentage, ratio, or all of the above?
  16. What is the postulate of equal a priori probability?
  17. What does phase space mean?
  18. How is Boltzmann's constant K related to gas constant R?
  19. In equilibrium state of system, what is the relationship between entropy and probability?
  20. What is Boltzmann's relation between entropy (S) and probability (Q)?
  21. What is the value of gamma (Y) for a molecule with n degrees of freedom?
  22. Which statistics are appropriate for photons?
  23. What is the number of degrees of freedom associated with each molecule of a monoatomic gas?
  24. What is the volume of a cell in six-dimensional phase space?
  25. What is the ratio of most probable speed and average speed in a gas?
  26. Which speed is most closely related to the kinetic energy of molecules?
  27. What is the Urms speed of particles having speeds 2, 3, 4, and 5 cm/s?
  28. For a molecule, what is the order between most probable speed (Ump), average speed (), and root mean square speed (Urms)?
  29. What are particles with any spin values called?
  30. In which model is the contribution of free electrons to specific heat taken into account?
  31. From which statistics can Planck's radiation law be obtained?
  32. What statistics do electrons in metals obey?
  33. To which statistics does Pauli's exclusion principle apply?
  34. What are the Miller indices of a plane cutting intercepts of 1, 2, and 3 along three axes?
  35. What kind of radiation is used for powdered method?
  36. Which structure has maximum packing fraction?
  37. What is the number of atoms per unit cell in b.c.c. lattice?
  38. What is the basic structure of NaCl?
  39. What is the total number of atoms per unit cell in diamond structure?
  40. Which symmetry is not compatible with crystal symmetry?
  41. What is the strongest bond?
  42. Which substance has hydrogen bonding?
  43. What is the Madelung constant for a one-dimensional ionic crystal lattice?
  44. In what structure do inert gas crystals crystallize?
  45. Which bond is directional?
  46. Which statistics do phonons obey?
  47. According to Dulong and Petit's law, what is the average energy of an atom at temperature T?
  48. How are optical vibrations produced?
  49. What is the spin of phonon?
  50. According to Wiedemann-Franz law, to what is the ratio of thermal to electrical conductivity of metals proportional?
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