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Engineering Physics — Major (End Semester) 2024 question paper

MMMUT Chemical Engineering previous year question paper for Engineering Physics (BSM - 131), semester 1, Major (End Semester) 2024. All 24 questions are listed below, each with a written answer on Nexsus.

Paper details

  • Subject: Engineering Physics (BSM - 131)
  • Branch: Chemical Engineering
  • Semester: 1
  • Exam: Major (End Semester) 2024
  • Questions: 24

Questions asked in Engineering Physics Major (End Semester) 2024

  1. Q1(a). (a) In Newton’s ring experiment the diameter of the 4 th and 12 th dark rings are 0.4 and 0.7 cm respectively. Find the diameter of 20 th dark ring. [2 marks]
  2. Q1(b). Distinguish between group velocity (v g ​ ) and the phase velocity (v p ​ ) of a wave packet and show that v g ​ v p ​ =c 2 [2 marks]
  3. Q1(c). An optical fibre has an NA of 0.20 and a cladding refractive index of 1.59. Determine the acceptance angle for the fibre in water, which has refractive index of 1.33. [2 marks]
  4. Q1(d). What are Einstein’s coefficients? Find the relation between Einstein’s coefficient [2 marks]
  5. Q1(e). (e) A cricket ball weighing 200 g is to be located within 1×10 −8 m. What is the uncertainty in its velocity? Comment on your result. [2 marks]
  6. Q1(f). Find the expression for the fringe width of interference fringes in a thin wedge-shaped film. [2 marks]
  7. Q1(g). Obtain the expression for the resolving power of grating. [2 marks]
  8. Q2(a). Write the Maxwell’s equations in integral and differential form. Explain the physical significance of each equation. [5 marks]
  9. Q2(b). Show that a plane electromagnetic wave equation can be expressed in the form ( F +k 2 ) E where k is the propagation vector equal to 2π/λ. [5 marks]
  10. Q2(c). The sunlight strikes the upper atmosphere of earth with energy flux 1.38 kW m of electric and magnetic field at that point. −2 . What will be the peak values … [5 marks]
  11. Q3(a). If the earth receives 2 cal min −1 cm −2 solar energy, what are the amplitudes of electric and magnetic fields of radiation? [5 marks]
  12. Q3(b). Explain the concept of Maxwell’s displacement current and show how it led to the modification of Ampere’s law. [5 marks]
  13. Q3(c). Derive electromagnetic wave equations in a conducting medium and discuss its solution. [5 marks]
  14. Q4(a). Explain the Meissner effect. Distinguish between Type I and Type II superconductors. [5 marks]
  15. Q4(b). Find the equilibrium electron and hole concentration and locate the Fermi level with respect to intrinsic level at T=300K. Given that N d ​ =8×10 16 cm −3 , n i ​ =1.5×10 10 cm −3 and N c ​ =2×10 19 cm −3 . [5 marks]
  16. Q4(c). Describe quantum wells, quantum wires and quantum dots. Mention their important properties. [5 marks]
  17. Q5(a). Define electrical conductivity in semiconducting materials. Also obtain the expression of conductivity for intrinsic and extrinsic semiconductors. [5 marks]
  18. Q5(b). The number of super electrons in a superconductor is 10 28 /m 3 at critical temperature T c ​ =3K. Calculate the penetration depths at 0K and 1K. [5 marks]
  19. Q5(c). What are optoelectronic materials? Describe their properties and applications. [5 marks]
  20. QQ1. Attempt any Five parts of the following. (Unit-1 & Unit-2)
  21. QQ2. . Attempt any Two parts of the following. (Unit-3)
  22. QQ3. Attempt any Two parts of the following. (Unit-3)
  23. QQ4.. Attempt any Two parts of the following. (Unit-4)
  24. QQ5. Attempt any Two parts of the following. (Unit-4)