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Physics of Applied Materials — Major (End Semester) 2023 question paper

MMMUT Mechanical Engineering previous year question paper for Physics of Applied Materials (BSM-180), semester 2, Major (End Semester) 2023. All 24 questions are listed below, each with a written answer on Nexsus.

Paper details

  • Subject: Physics of Applied Materials (BSM-180)
  • Branch: Mechanical Engineering
  • Semester: 2
  • Exam: Major (End Semester) 2023
  • Questions: 24

Questions asked in Physics of Applied Materials Major (End Semester) 2023

  1. Q1. Attempt any five parts of the following.
  2. Q1(a). Define "Atomic Packing Fraction". Obtain atomic packing fraction of an fcc crystal. [2 marks]
  3. Q1(b). Explain the term "Group Velocity". State and prove Heisenberg Uncertainty principle. [2 marks]
  4. Q1(c). Show that an electron in an atom does not stay inside its nucleus. [2 marks]
  5. Q1(d). State the "Gauss Law of electrostatics" and obtain the expression for the electric field due to a charged hollow sphere having internal and external radius R1 and R2. [2 marks]
  6. Q1(e). Write down Maxwell equations in differential and integral forms. Explain the terms and their physical meanings. [2 marks]
  7. Q1(f). Derive Time Dependent Schrodinger equation. Write down expressions for momentum and kinetic energy operator. [2 marks]
  8. Q1(g). Define 0D, 1D and 2D nanomaterials. Give two examples of each. [2 marks]
  9. Q2. Attempt any two parts of the (Unit-I) following.
  10. Q2(a). Define coordination number. Sketch soc, bec and fcc lattice and obtain coordination numbers for each type of lattice. [5 marks]
  11. Q2(b). Define the term "Miller Indices". Calculate the Miller Indices of an atomic plane cutting a/2, -3b/2 and ∞ intercepts on X, Y and Z crystallographic axes. Also sketch the plane. [5 marks]
  12. Q2(c). Derive Bragg's law. The distance between adjacent atomic planes in calcite is 0.30 nm. Find the angle between the incident and diffracted rays for 0.030 nm X-rays. [5 marks]
  13. Q3. Attempt any two parts of the (Unit-II) following.
  14. Q3(a). find the kinetic energy of an electron whose de Broglie wavelength is the same as that of a 100 MeV X-rays. [5 marks]
  15. Q3(b). Describe Davisson-Germer experiment with the help of a neat and clean diagram, and explain how does it prove the wav-nature of electron? [5 marks]
  16. Q3(c). Obtain the wave-function and energy eigen values for an electron trapped in a one dimensional infinite potential well. If the dimension size is 2 nm, how much energy is required to make an electron jump from ground state to the second excited state? [5 marks]
  17. Q4. Attempt any two parts of the (Unit-III) following.
  18. Q4(a). Derive Maxwell's Fourth equation. Explain the physical significance of displacement current by giving an appropriate example. [5 marks]
  19. Q4(b). Show that the electromagnetic waves travel with a constant speed i.e. c = 3 × 10^5 m/s. [5 marks]
  20. Q4(c). Show that electric and magnetic vectors are perpendicular to the direction of propagation for an electromagnetic wave. [5 marks]
  21. Q5. Attempt any two parts of the (Unit-IV) following.
  22. Q5(a). Explain Meissner effect? Classify and explain Type-I and Type-II superconductors on its basis with the help of neat and clean diagrams. Give one example of each. [5 marks]
  23. Q5(b). Define superconductivity and account reasons for its origin. [5 marks]
  24. Q5(c). Explain the origin of band gap giving the example of silicon. What do you mean by direct and indirect band-gap semiconductors? Explain with the help of appropriate examples. [5 marks]