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Engineering Physics — Major (End Semester) 2024 question paper

MMMUT Computer Science and Engineering previous year question paper for Engineering Physics (BSM-131), semester 1, Major (End Semester) 2024. All 19 questions are listed below, each with a written answer on Nexsus.

Paper details

  • Subject: Engineering Physics (BSM-131)
  • Branch: Computer Science and Engineering
  • Semester: 1
  • Exam: Major (End Semester) 2024
  • Questions: 19

Questions asked in Engineering Physics Major (End Semester) 2024

  1. Q1(a). In Newton's ring experiment the diameter of the 4th and 12th dark rings are 0.4 and 0.7cm. respectively. Find the diameter of 20th 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_p v_g = 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 coefficients. [2 marks]
  5. Q1(e). A cricket ball weighing 200 g is to be located within 1x10^-9 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 equation 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 of (del^2 + k^2)E = 0 where k is the propagation vector equal to 2pi/lambda. [5 marks]
  10. Q2(c). The sunlight strikes the upper atmosphere of earth with energy flux 1.38 kWm^-2. What will be the peak values of electric and magnetic field at that point. [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 in Silicon at T=300K. Given that Nd = 8x10^16/cm^3, ni = 1.5x10^10/cm^3 and Na = 2x10^16/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 Tc = 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]