Engineering Physics PYQ 2024-25 AKTU Question Paper

AKTU · BTECH · Semester 1, 2 · Engineering Physics · Session 2024-25 · PYQ

AKTU Engineering Physics previous year question paper 2024-25 for B.Tech Semester 1/2. Covers Quantum Mechanics, Electromagnetic Field Theory, Wave Optics…

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Engineering Physics AKTU syllabus

  1. Unit 1: Quantum Mechanics
  2. Unit 2: Electromagnetic Field Theory
  3. Unit 3: Wave Optics
  4. Unit 4: Fiber Optics and Laser
  5. Unit 5: Superconductors and Nano-Materials

Questions in Engineering Physics AKTU PYQ 2024-25

  1. Q1a. What do you mean by population inversion? (2 marks, 2024-25)
  2. Q1a. State the assumptions made by the Planck's to explain black body radiation curve. (2 marks, 2024-25)
  3. Q1b. What is Wein's displacement law? (2 marks, 2024-25)
  4. Q1b. Describe the term wave packet in Quantum Mechanics. (2 marks, 2024-25)
  5. Q1c. Define Dispersive power of grating. (2 marks, 2024-25)
  6. Q1c. Explain the term skin depth with necessary formulae. (2 marks, 2024-25)
  7. Q1d. An electromagnetic wave of frequency 10 MHz is incident normally on a good conductor (e.g., copper) with conductivity σ = 5.8 × 10⁷ S/m and relative permeability μᵣ = 1. What is the skin depth δ of the wave in the conductor? (Use μ₀ = 4π × 10⁻⁷ H/m) (2 marks, 2024-25)
  8. Q1d. Centre is dark in Newton's rings experiment. Explain it. (2 marks, 2024-25)
  9. Q1e. What is de Broglie wave for a moving particle at temperature T? (2 marks, 2024-25)
  10. Q1e. Differentiate Spontaneous Emission and Stimulated Emission. (2 marks, 2024-25)
  11. Q1f. Show that perfect diamagnetism is an essential property of the superconductor. (2 marks, 2024-25)
  12. Q1f. State the formula to calculate the cut off parameter and Number of modes in the fiber. (2 marks, 2024-25)
  13. Q1g. A Fiber made of silicon with a diameter of the core is such that it consists of core and claddings refractive indexes of 1.40 and 1.37. Find the numerical aperture of Fiber. (2 marks, 2024-25)
  14. Q1g. Discuss the term Quantum Well and Quantum Wire. (2 marks, 2024-25)
  15. Q2a. Derive the conditions of Maxima & Minima in reflected light in a thin film of uniform thickness. (7 marks, 2024-25)
  16. Q2a. Derive Schrodinger's time independent wave equation for a free particle and give the physical interpretation of wave function. (7 marks, 2024-25)
  17. Q2b. Derive differential form of Maxwell's equations. (7 marks, 2024-25)
  18. Q2b. Derive electromagnetic wave equation in free space. Prove that electromagnetic wave propagates with speed of light. (7 marks, 2024-25)
  19. Q2c. Discuss construction and working of He-Ne Laser. (7 marks, 2024-25)
  20. Q2c. Explain interference in thin films due to reflected light of uniform thickness and obtain the condition of bright and dark rings. (7 marks, 2024-25)
  21. Q2d. Derive Expression for diameter of dark ring in Newton's rings. (7 marks, 2024-25)
  22. Q2d. Explain the process of absorption of radiation, spontaneous emission and stimulated emission with diagram. Show that A21/B21 = 8πhv³/c³ (7 marks, 2024-25)
  23. Q2e. Describe the experiment of Davisson and Germer to demonstrate the wave character of electrons. (7 marks, 2024-25)
  24. Q2e. Explain type I and II superconductors. For a specimen of superconductor, the critical fields are 1.4 x 10⁵ and 4.2 x 10⁵ A/m for temperature 14K and 13K respectively. Calculate the transition temperature and fields at 0 K and 4.2 K. (7 marks, 2024-25)
  25. Q3a. Explain the construction and working principle of an optical fiber. Define acceptance angle and numerical aperture, and derive the relation between them. (7 marks, 2024-25)
  26. Q3a. Describe the experiment of Davisson and Germer to demonstrate the wave character of electrons. (7 marks, 2024-25)
  27. Q3b. Derive change in wavelength in Compton scattering. Why Compton effect is not observed for visible light? (7 marks, 2024-25)
  28. Q3b. A particle is moving in one dimensional potential box (of infinite height) of width 20 Å. Calculate the probability of finding the particle within an interval of 10 Å at the centre of the box when it is in its state of least energy. (7 marks, 2024-25)
  29. Q4a. Derive relation between Einstein's coefficients. (7 marks, 2024-25)
  30. Q4a. Derive work-energy theorem for the flow of energy in an electromagnetic field. (7 marks, 2024-25)
  31. Q4b. State and Prove Poynting theorem. (7 marks, 2024-25)
  32. Q4b. Assuming that all the energy from a 1000 watt lamp is radiated uniformly; calculate the electric field and magnetic field of radiations at a distance of 5m from the lamp. (7 marks, 2024-25)
  33. Q5a. Discuss Fraunhofer diffraction of light at a double slit and obtain the conditions for diffraction and interference maxima and minima. (7 marks, 2024-25)
  34. Q5a. Discuss the phenomenon of Fraunhofer diffraction at a single slit. Show that the intensity of first subsidiary maximum is about 4.5% of the principal maximum. (7 marks, 2024-25)
  35. Q5b. Derive the wave equations for electric and magnetic fields in vacuum using Maxwell's equations. Discuss the transverse nature of electromagnetic waves and explain how the electric and magnetic fields are oriented with respect to the direction of propagation. (7 marks, 2024-25)
  36. Q5b. A parallel beam of sodium light of wavelength 5880 Å is incident on a thin glass plate of refractive index 1.5 such that the angle of refraction in plate is 60°. Calculate the smallest thickness of the plate, which will make it appear dark by reflection. (7 marks, 2024-25)
  37. Q6a. (i) What are Newton's rings? Why are they circular in shape? Newton's rings are observed in reflected light of wavelength 5900Å. The diameter of 10th dark ring is 0.50 cm. Find the radius of curvature of the lens. (ii) A monochromatic light of wavelength λ=600 nm is incident normally on a plane… (7 marks, 2024-25)
  38. Q6a. Explain the term acceptance angle, acceptance cone and numerical aperture of an optical fiber with labelled diagram and derive expression for numerical aperture in terms of relative refractive index difference. (7 marks, 2024-25)
  39. Q6b. Obtain the normalized wave function and energy Eigen values for a particle in a box. (7 marks, 2024-25)
  40. Q6b. Explain the construction and working of He-Ne laser with proper-labelled diagram. (7 marks, 2024-25)

AKTU paper codes: BAS101, BAS201, KAS101, KAS201

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