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Engineering Physics important questionsMost repeated in SPPU papers

These 57 questions appeared in more than one SPPU Engineering Physics paper we have: 17 papers, from May 2022 to Mar 2026. The most-asked come first. Each one links to the papers it was asked in.

All Engineering Physics papers and notes

Repeated questions

Endsem questions (48)

  1. 10×asked

    Starting from de Broglie equation, derive Schrodinger’s Time Independent wave equation.

    Feb 2026 ·Nov 2025 ·May 2025 ·Apr 2025 ·Nov 2024 ·Nov 2024 ·May 2024 ·Nov 2023 ·May 2023 ·May 2022

  2. 9×asked

    State and explain Hall Effect. Derive the equation of Hall voltage and Hall coefficient.

    Feb 2026 ·Nov 2025 ·May 2025 ·Apr 2025 ·Nov 2024 ·May 2024 ·Nov 2023 ·May 2023 ·May 2022

  3. 6×asked

    An ultrasonic pulse is sent through a steel block, an echo is recorded after 1.512 microseconds, calculate the thickness of steel block if the velocity of ultrasonic waves is 5900 m/s.

    Feb 2026 ·Apr 2025 ·Nov 2024 ·Nov 2024 ·May 2024 ·Nov 2023

  4. 6×asked

    Differentiate between step index and graded index fibers. (Any three points)

    Feb 2026 ·Oct 2025 ·Apr 2025 ·Mar 2025 ·Nov 2024 ·Mar 2024

  5. 6×asked

    For a particle trapped in a one-dimensional rigid box, derive the equation for its energy.

    Feb 2026 ·Nov 2025 ·Apr 2025 ·May 2024 ·Nov 2023 ·May 2022

  6. 6×asked

    Explain Optical and electrical properties of nanoparticles in details.

    Nov 2025 ·Nov 2024 ·Nov 2024 ·May 2024 ·Nov 2023 ·May 2023

  7. 6×asked

    What is NDT? Differentiate between destructive testing and non-destructive testing (any 04 points).

    Nov 2025 ·Nov 2024 ·May 2024 ·Nov 2023 ·May 2023 ·May 2022

  8. 4×asked

    Explain the Meissner effect. What is the cause of the Meissner effect? Show that superconductors exhibit perfect diamagnetism.

    Feb 2026 ·Apr 2025 ·Nov 2024 ·Nov 2023

  9. 4×asked

    Lowest energy of an electron trapped in potential well is 38 eV. Calculate the width of well.

    Feb 2026 ·Apr 2025 ·May 2024 ·May 2022

  10. 4×asked

    By using energy band theory of solids explain classification of solids into conductors, semiconductors and insulators.

    Nov 2024 ·Nov 2024 ·Nov 2023 ·May 2023

  11. 4×asked

    For an electron accelerated by a potential difference V, derive the expression for its de Broglie wavelength.

    Nov 2024 ·Nov 2023 ·May 2023 ·May 2022

  12. 3×asked

    Explain the application of interference as an antireflection coating.

    Feb 2026 ·Apr 2025 ·Nov 2024

  13. 3×asked

    What is an echo sounding technique? Using this technique explain the method for flaw detection using ultrasonic waves.

    Feb 2026 ·Apr 2025 ·May 2024

  14. 3×asked

    What is attenuation in optical fibers? Discuss in brief the various internal and external factors responsible for attenuation.

    Feb 2026 ·Apr 2025 ·Nov 2024

  15. 3×asked

    Derive an expression for the conductivity in an intrinsic and extrinsic Semiconductor.

    Nov 2025 ·May 2025 ·May 2022

  16. 3×asked

    For a P-N junction diode, draw an energy band diagram showing the position of the Fermi level in: Forward bias mode

    Nov 2024 ·May 2024 ·May 2023

  17. 2×asked

    Define Fermi level for metal. Write the formula for Fermi-Dirac distribution function and explain the terms involved in it.

    Feb 2026 ·Apr 2025

  18. 2×asked

    Differentiate between classical and quantum computing (any three).

    Feb 2026 ·Apr 2025

  19. 2×asked

    Differentiate between positive and negative crystal.

    Feb 2026 ·Apr 2025

  20. 2×asked

    Explain electrical and optical properties of nanoparticles. [6] SPPU QUESTION PAPER www.mysppu.in Page 4 MySPPU · Engineering Physics Page 4 of 4

    Feb 2026 ·Apr 2025

  21. 2×asked

    Explain the process of manufacturing nanoparticles using Physical Vapor Deposition. State advantages and limitations of this method.

    Feb 2026 ·Apr 2025

  22. 2×asked

    For a thin parallel film derive an expression for the effective path difference in the reflected system. Obtain the condition of maximum and minimum.

    Feb 2026 ·Apr 2025

  23. 2×asked

    Obtain the intensity of light transmitted by the analyzer if the angle between polarizer and analyzer is 45°.

    Feb 2026 ·Apr 2025

  24. 2×asked

    State characteristics of a laser. Explain any one of them in brief.

    Feb 2026 ·Apr 2025

  25. 2×asked

    State de Broglie hypothesis. Derive the equation of de Broglie wavelength by analogy with radiation.

    Feb 2026 ·Apr 2025

  26. 2×asked

    The wedge-shaped film of refractive index 1.5, is illuminated by the light of wavelength 5890 Å. If the angle of the wedge is 30 seconds, calculate the fringe width.

    Feb 2026 ·Apr 2025

  27. 2×asked

    What is Critical magnetic field? Write its equation and explain the terms involved in it. A superconductor has a critical temperature of 3.7 K. At 0 K the critical magnetic field is 0.0306 Tesla. What is the critical magnetic field at temperature 2 K.

    Feb 2026 ·Apr 2025

  28. 2×asked

    What is stimulated emission? Explain its significance in the production of lasers.

    Feb 2026 ·Apr 2025

  29. 2×asked

    Acoustic emission technique

    Nov 2025 ·May 2022

  30. 2×asked

    Define the terms Magnetic Susceptibility, Relative Permeability and obtain relation between them.

    Nov 2025 ·May 2023

  31. 2×asked

    State and explain Meissner effect. Show that superconductors are perfect diamagnetic in nature.

    Nov 2025 ·Nov 2024

  32. 2×asked

    State and explain the term superconductivity. Differentiate between type I and type II superconductors (any 04 points).

    Nov 2025 ·May 2022

  33. 2×asked

    State de Broglie hypothesis. Derive the equation of de Broglie wavelength in terms of Kinetic Energy of a particle.

    Nov 2025 ·Nov 2024

  34. 2×asked

    State different application of Nanotechnology and Explain applications of nanoparticles in targeted drug delivery.

    Nov 2025 ·May 2025

  35. 2×asked

    What is nanotechnology? Explain how quantum confinement and change in surface area to volume ratio affects the properties of nanoparticles.

    Nov 2025 ·Nov 2024

  36. 2×asked

    Hall effect is true for i) Metals only ii) P-type semiconductors only iii) N type semiconductors iv) All of the above

    May 2025 ·May 2024

  37. 2×asked

    State and explain de Broglie hypothesis of matter waves. Write any two properties of matter waves.

    May 2025 ·May 2024

  38. 2×asked

    State and explain Heisenberg’s uncertainty principle.

    May 2025 ·Nov 2023

  39. 2×asked

    Draw the I-V characteristics of solar cell and define the terms; i) Fill factor ii) Open circuit voltage iii) Short circuit current

    Nov 2024 ·May 2023

  40. 2×asked

    Explain superconductivity. Differentiate between Type I & Type II superconductors (Any 4 pts).

    Nov 2024 ·Nov 2023

  41. 2×asked

    The critical temperature for lead is 7.2K. However at 5K it loses its superconductivity when subjected to a magnetic field of 3.3×10 4 A/m. Find the maximum value of critical magnetic field which will allow the metal to retain its superconductivity at 0°K.

    Nov 2024 ·May 2022

  42. 2×asked

    State applications of nanotechnology in the field of electronics (any four). Explain any one application in brief.

    May 2024 ·May 2023

  43. 2×asked

    What is the Heisenberg uncertainty Principle/ Explain it using narrow and broad wave packets.

    May 2024 ·May 2022

  44. 2×asked

    Calculate the energy difference between the ground state and first excited state of an electron in the rigid box of length 1 A°. 3

    Nov 2023 ·May 2023

  45. 2×asked

    Explain DC and AC Josephson effect in brief.

    Nov 2023 ·May 2022

  46. 2×asked

    Define wave function. Write the conditions of well behaved wave function.

    May 2023 ·May 2022

  47. 2×asked

    Differentiate between diamagnetism, paramagnetism and ferromagnetism. (Any two points)

    May 2023 ·May 2022

  48. 2×asked

    What is echosounding technique? Using this technique explain non destructive testing for the measurement of thickness of a metal sheet using ultrasonic waves.

    May 2023 ·May 2022

Insem questions (9)

  1. 8×asked

    Explain double refraction phenomenon with the help of Huygen wave theory.

    Mar 2026 ·Feb 2026 ·Oct 2025 ·Apr 2025 ·Nov 2024 ·Mar 2024 ·Oct 2023 ·Oct 2022

  2. 7×asked

    Describe principal, construction and working of CO 2 Laser.

    Mar 2026 ·Feb 2026 ·Oct 2025 ·Apr 2025 ·Mar 2025 ·Sep 2024 ·Mar 2024

  3. 6×asked

    What is holography? Explain the process of hologram recording.

    Mar 2026 ·Mar 2025 ·Sep 2024 ·Mar 2024 ·Oct 2023 ·Oct 2022

  4. 5×asked

    Calculate the numerical aperture and acceptance angle of an optical fiber having n1 = 1.48 and n2 = 1.45.

    Feb 2026 ·Nov 2024 ·Sep 2024 ·Oct 2023 ·Oct 2022

  5. 2×asked

    Define optical fibres. Explain step index fibre and graded index fibre.

    Mar 2026 ·Oct 2022

  6. 2×asked

    In a plane diffraction grating, the angle of diffraction for the second order principal maximum for the light of wavelength 5×10 –5 cm is 30°. Calculate the number of lines per centimeter of the grating surface.

    Oct 2025 ·Oct 2023

  7. 2×asked

    What is acceptance angle? In an optical fiber, core and cladding has refractive indices 1.61 and 1.42 respectively. Calculate the values of acceptance angle and numerical aperture.

    Sep 2024 ·Mar 2024

  8. 2×asked

    Explain the process of fiber optic communication system with block diagram. State any two advantages of optical fiber communications.

    Mar 2024 ·Oct 2023

  9. 2×asked

    Explain with neat labelled diagram construction and working of a carbon dioxide laser.

    Oct 2023 ·Oct 2022

Questions count as repeated when their wording matches closely across papers. Numericals that depend on a figure are left out, since the figure changes from paper to paper.