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PH3151 Engineering Physics Previous Year Question Papers - Anna University

Access Anna University Engineering Physics (PH3151) previous year question papers on LearnSkart for smarter semester exam preparation. This Anna University PYQ page offers year-wise Anna University exam papers aligned with Regulation 2021, so students can understand recurring questions, important units, and expected marking schemes. You can view every PH3151 Engineering Physics question paper online and use free PDF download options for focused revision before internal and semester exams.

2024

  • 2024 - GENERAL-AM-2024-PH 3151-Engineering Physics-865065797-51502.pdf
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2023

  • 2023 - SH-AM-2023-PH 3151-Engineering Physics-107812883-20230926191457 (3).pdf
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  • 2023 - SH-AM-2023-PH 3151-Engineering Physics-298448171-20230926191457 (8).pdf
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  • 2023 - SH-ND-2023-PH 3151-Engineering Physics-894423483-21140.pdf
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2022

  • 2022 - SH-AM-2022-PH 3151-Engineering Physics-404162839-PH 3151.pdf
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Important Questions - PH3151 Engineering Physics

UNIT 1 - Mechanics

Part A

  • Define moment of inertia and radius of gyration
  • State parallel axis and perpendicular axis theorems
  • Define torque and angular momentum
  • What is a gyroscope? State its significance

Part B

  • Derive moment of inertia of a rod and circular disc
  • Explain torsional pendulum and determination of rigidity modulus
  • Explain gyroscopic motion and derive gyroscopic couple
  • Derive rotational kinetic energy of a rigid body

UNIT 2 - Electromagnetic Waves

Part A

  • State Maxwell's equations (integral form)
  • Define Poynting vector and its unit
  • What is skin depth?
  • List properties of electromagnetic waves

Part B

  • Derive Maxwell's equations (integral and differential forms)
  • Derive electromagnetic wave equation in free space
  • Explain Poynting theorem
  • Discuss reflection and transmission of EM waves

UNIT 3 - Oscillations, Optics and Lasers

Part A

  • Define spontaneous and stimulated emission
  • What is population inversion?
  • Define damping and resonance
  • What is air wedge?

Part B

  • Derive Einstein's A and B coefficients
  • Explain working of Nd:YAG / CO2 laser
  • Explain air wedge experiment for thickness measurement
  • Derive equation of damped oscillations

UNIT 4 - Quantum Mechanics

Part A

  • Define Compton effect and write formula
  • What is wave function (psi)?
  • Define de Broglie wavelength
  • State uncertainty principle

Part B

  • Derive Compton shift equation
  • Derive Schrodinger wave equation
  • Solve particle in a 1D box
  • Explain G.P. Thomson experiment

UNIT 5 - Applied Quantum Mechanics

Part A

  • Define quantum tunneling
  • State Bloch's theorem
  • What is RTD (Resonant Tunneling Diode)?
  • Applications of STM

Part B

  • Explain STM (principle, construction, working)
  • Discuss Kronig-Penney model (qualitative)
  • Explain quantum harmonic oscillator
  • Explain V-I characteristics of RTD

Most Repeated / High-Weight Questions

Maxwell's equations, EM wave equation, Compton effect, Schrodinger wave equation, laser working, STM principle, gyroscopic motion, moment of inertia derivations.

Additional Resources

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Frequently Asked Questions about PH3151 Question Papers

Which PH3151 topics are derivation-heavy?

Units 1, 2, 4, and 5 require derivations of equations like moment of inertia, electromagnetic wave equations, Compton shift, and Schrödinger equation. Focus on understanding each step in derivations rather than memorizing to handle variations in exam questions.

How should I prepare for PH3151 Part A and Part B differently?

Part A (2-3 marks) requires concise definitions and statements—memorize these exactly. Part B (15 marks) requires derivations and explanations—practice deriving formulas and explaining concepts with diagrams from previous year papers.

Which PH3151 units appear most frequently in exams?

Units 2 (Electromagnetic Waves), 3 (Lasers), and 4 (Quantum Mechanics) appear most frequently. Maxwell's equations, laser working principles, and quantum concepts like Compton effect are high-weight topics that repeat across years.

Do I need to memorize Maxwell's equations for PH3151?

Yes, both integral and differential forms are important for Part A and Part B. Practice writing them multiple times and understand their physical meaning. Use previous year papers to see how questions are asked and practice deriving electromagnetic wave equations from Maxwell's equations.

What is the best strategy for PH3151 quantum mechanics topics?

Understand the physical concepts first (wave-particle duality, uncertainty principle). Then practice derivations and numerical problems. Use previous year papers to identify frequently asked questions like particle in a box, Compton effect, and Schrödinger equation applications.

Are PH3151 question papers enough without textbooks?

Question papers help understand exam patterns and practice, but textbooks provide deeper conceptual understanding needed for derivations. Use question papers to practice and identify weak areas, then refer to textbooks to clarify those concepts.