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Engineering Physics — Minor 2024 question paper

MMMUT Mechanical Engineering previous year question paper for Engineering Physics (BSM-131), semester 1, Minor 2024. All 13 questions are listed below, each with a written answer on Nexsus.

Paper details

  • Subject: Engineering Physics (BSM-131)
  • Branch: Mechanical Engineering
  • Semester: 1
  • Exam: Minor 2024
  • Questions: 13

Questions asked in Engineering Physics Minor 2024

  1. Q1. Attempt any Three parts of the following. Q.1(a) is compulsory. (Unit-1 & Unit-2)
  2. Q1(a). Describe the Davisson and Gerner experiment to demonstrate the wave nature of a particle. [4 marks]
  3. Q1(b). Explain the construction and working of ruby laser with necessary diagram. [2 marks]
  4. Q1(c). Find the energy of an electron moving in one dimension in an infinitely high potential box of width 1 Å. (Mass of the electron is 9.1 × 10^-31 kg and h = 6.63 × 10^-34 Js.) [2 marks]
  5. Q1(d). Explain the phenomena of interference. What are the conditions to get the sustained interference of light? [2 marks]
  6. Q2. Attempt any Two parts of the following. Q.2(a) is compulsory. (Unit-1)
  7. Q2(a). Discuss the phenomenon of Fraunhofer diffraction at a single slit and show that the relative intensities of the successive maxima are nearly 1: 4/9π^2 : 4/25π^2 : 4/49π^2 : … [4 marks]
  8. Q2(b). The indices of refraction of quartz for right-handed and left-handed circularly polarised light of wavelength 7620 Å are 1.53914 and 1.53920, respectively. Calculate the rotation of the plane of polarisation of the light in degrees produced by a plate 0.5 mm thick. [2 marks]
  9. Q2(c). In Newton's ring experiment, the diameter of 4th and 12th dark rings are 0.4 and 0.7 cm, respectively. Find the diameter of 20th dark ring. [2 marks]
  10. Q3. Attempt any Two parts of the following. Q.3(a) is compulsory. (Unit-2)
  11. Q3(a). Solve Schrödinger's wave equation for a particle in a one-dimensional rigid box of side L and having potential energy (V) as follows: V(x) = ∞ for x < 0 and x > L and V(x) = 0 for 0 ≤ x ≤ L [4 marks]
  12. Q3(b). A proton is accelerated to one-tenth of the velocity of light. If the velocity can be measured with a precision of ± 1%, what will be the uncertainty in its position? (m_p = 1.675 × 10^-27 kg) [2 marks]
  13. Q3(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]