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EndsemApr 20252024 patternFE

Engineering Physics SPPU Endsem Question Paper Apr 2025

All 11 questions from this SPPU endsem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated Engineering Physics questions
Pattern
2024 pattern
Exam
Endsem
Session
Apr 2025
Max. marks
70
Time
2½ Hours
Semester
I/II
Paper code
[6401]-2402

Printed for: F.E.

Instructions to the candidates

  1. Q.1 is compulsory.
  2. Attempt Q.2 or Q.3, Q.4 or Q.5, Q.6 or Q.7, Q.8 or Q.9, and Q.10 or Q.11.
  3. Neat diagrams must be drawn wherever necessary.
  4. Assume suitable data, if necessary.

Questions

  1. Q1

    1. Choose the correct answer and rewrite it. i) Carbon dioxide laser emits wavelength in _________

      [10]
    2. a)

      Visible region b) Ultraviolet region

    3. c)

      Infrared region d) None of the Above ii) In optical fiber, acceptance cone is ____ the acceptance angle

    4. a)

      Equal b) Double

    5. c)

      Half d) One Third iii) The mater waves are ____

    6. a)

      Electromagnetic waves

    7. b)

      Mechanical Waves

    8. c)

      ultrasonic waves

    9. d)

      Neither Electromagnetic nor Mechanical Waves P.T.O. SPPU QUESTION PAPER www.mysppu.in Page 1 MySPPU · Engineering Physics Page 1 of 4 iv) Wave function  of a particle is

    10. a)

      a real quantity b) a complex quantity

    11. c)

      an imaginary quantity d) none of these v) The points of constructive interference of light are,

    12. a)

      Always bright b) May be bright or dark

    13. c)

      Always dark d) Neither bright nor dark vi) The Plane-polarized light, vibrations of particles in medium are in the direction .... to direction propagation of light.

    14. a)

      Parallel b) perpendicular

    15. c)

      Antiparallel d) None vii) The energy band gap size for semiconductors is in the range__ eV.

    16. a)

      This part has equations that don’t show as text. Open the PDF to read it.

    17. c)

      3-4 d) > 4 viii) The Frequency range for ultrasonic is

    18. a)

      This part has equations that don’t show as text. Open the PDF to read it.

    19. c)

      Greater Than 20 KHz d) None of the above ix) The minimum magnetic field required to destroy superconductivity is called ________

    20. a)

      Critical magnetic field b) Applied magnetic field

    21. c)

      External magnetic field d) None x) Nanotechnology studies for the size of particles

    22. a)

      This part has equations that don’t show as text. Open the PDF to read it.

    23. c)

      This part has equations that don’t show as text. Open the PDF to read it.

  2. Q2

    1. a)

      With the help of an energy level diagram, explain the construction and working of CO 2 laser.

      Also asked:Mar 2026 ·Feb 2026 ·Oct 2025 ·Mar 2025 ·Sep 2024 ·Mar 2024

      [6]
    2. b)

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

      Also asked:Feb 2026 ·Oct 2025 ·Mar 2025 ·Nov 2024 ·Mar 2024

      [3]
    3. c)

      Calculate the numerical aperture and acceptance angle of an optical fiber having n 1 = 1.48 and n 2 = 1.45 OR SPPU QUESTION PAPER www.mysppu.in Page 2 MySPPU · Engineering Physics Page 2 of 4

      [3]

  3. Q3

    1. a)

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

      Also asked:Feb 2026 ·Nov 2024

      [6]
    2. b)

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

      Also asked:Feb 2026

      [3]
    3. c)

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

      Also asked:Feb 2026

      [3]

  4. Q4

    1. a)

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

      Also asked:Feb 2026 ·Nov 2025 ·May 2025 ·Nov 2024 ·Nov 2024 ·May 2024 ·Nov 2023 ·May 2023 ·May 2022

      [6]
    2. b)

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

      Also asked:Feb 2026

      [3]
    3. c)

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

      Also asked:Feb 2026 ·May 2024 ·May 2022

      [3]

  5. Q5

    1. a)

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

      Also asked:Feb 2026 ·Nov 2025 ·May 2024 ·Nov 2023 ·May 2022

      [6]
    2. b)

      Differentiate between classical and quantum computing (any three).

      Also asked:Feb 2026

      [3]
    3. c)

      This part has equations that don’t show as text. Open the PDF to read it.

      [3]

  6. Q6

    1. a)

      Explain interference in thin parallel film in the reflected system with a neat & labelled diagram. Calculate the total path difference. Obtain the condition of maximum and minimum.

      Also asked:Feb 2026

      [6]
    2. b)

      Differentiate between positive and negative crystal.

      Also asked:Feb 2026

      [3]
    3. c)

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

      Also asked:Feb 2026

      [3]

  7. Q7

    1. a)

      What is double refraction? Explain Huygens ’ theory of double refraction.

      Also asked:Mar 2026 ·Feb 2026 ·Oct 2025 ·Nov 2024 ·Mar 2024 ·Oct 2023 ·Oct 2022

      [6]
    2. b)

      Explain the application of interference as an antireflection coating.

      Also asked:Feb 2026 ·Nov 2024

      [3]
    3. c)

      The wedge-shaped film with a refractive index of 1.5, is illuminated by the light of wavelength 5890A°, If the angle of the wedge is 30 seconds, Calculate the fringe width. [3] SPPU QUESTION PAPER www.mysppu.in Page 3 MySPPU · Engineering Physics Page 3 of 4

      Also asked:Feb 2026

  8. Q8

    1. a)

      With the help of a neat, labelled diagram, explain the Hall effect. Derive the equation of Hall voltage and Hall coefficient.

      Also asked:Feb 2026 ·Nov 2025 ·May 2025 ·Nov 2024 ·May 2024 ·Nov 2023 ·May 2023 ·May 2022

      [6]
    2. b)

      What are ultrasonic waves? State characteristics of ultrasonic wave. (any four)

      [3]
    3. c)

      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 rn/s.

      Also asked:Feb 2026 ·Nov 2024 ·Nov 2024 ·May 2024 ·Nov 2023

      [3]

  9. Q9

    1. a)

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

      Also asked:Feb 2026 ·May 2024

      [6]
    2. b)

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

      Also asked:Feb 2026

      [3]
    3. c)

      This part has equations that don’t show as text. Open the PDF to read it.

      [3]

  10. Q10

    1. a)

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

      Also asked:Feb 2026

      [6]
    2. b)

      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.

      Also asked:Feb 2026

      [6]

  11. Q11

    1. a)

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

      Also asked:Feb 2026 ·Nov 2024 ·Nov 2023

      [6]
    2. b)

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

      Also asked:Feb 2026

      [6]