Engineering Physics (BAS101) AKTU previous year questions 2022–2026
Every Engineering Physics question from 9 AKTU papers, tagged by unit, topic and marks. A few recent questions from each unit are listed below; open the page to filter by unit, topic or mark type.
Unit 1: Quantum Mechanics – AKTU PYQs
- Calculate the energy difference between the ground state and the first excited state for an electron in a one-dimensional rigid box of length 10⁻¹⁰ m. (2 marks, 2026, Particle in a Box)
- Describe the Davisson–Germer experiment with a neat diagram. How does this experiment verify de Broglie's hypothesis of matter waves? (7 marks, 2026, de-Broglie Matter Waves)
- Explain the concept of black body radiation and state the main features of Planck's radiation law. (7 marks, 2026, Blackbody Radiation Planck Theory)
- Write and solve the Schrödinger wave equation for a particle in a one-dimensional infinite potential box and obtain its eigenfunctions and eigenvalues. (7 marks, 2026, Particle in a Box)
- State the assumptions made by the Planck's to explain black body radiation curve. (2 marks, 2025, Blackbody Radiation Planck Theory)
Unit 2: Electromagnetic Field Theory – AKTU PYQs
- State the physical significance of displacement current in Maxwell's equations. (2 marks, 2026, Basic Laws Electricity Magnetism)
- Explain the concept of Poynting vector and discuss its physical meaning. (7 marks, 2026, Poynting Vector and Theorem)
- Deduce the equation for the propagation of plane electromagnetic waves in the free space. Show that the electric and magnetic vectors are normal to each other and to the direction of propagation of the wave. (7 marks, 2026, Plane Electromagnetic Waves)
- Explain the principle of conservation of electric charge and discuss its importance in electromagnetic theory. (7 marks, 2026, Basic Laws Electricity Magnetism)
- Explain the term skin depth with necessary formulae. (2 marks, 2025, Plane Electromagnetic Waves)
Unit 3: Wave Optics – AKTU PYQs
- For a plane transmission grating with 5000 lines/cm, determine the highest order of spectrum observable with light of 6000 Å. (2 marks, 2026, Diffraction Grating)
- Discuss the formation of interference fringes due to a thin wedge-shaped film as seen by normally reflected sodium light. Derive an expression for the fringe width. (7 marks, 2026, Interference of Light)
- Explain and obtain the condition of absent spectra in plane transmission grating. If the width d of the opaque space (ruling) is equal to the width e of the transparent space, which orders will be absent? Which if d = 2e? (7 marks, 2026, Diffraction of Light)
- Discuss Fraunhofer Diffraction of light at a double slit and obtain the conditions for diffraction and interference maxima and minima. (7 marks, 2026, Diffraction of Light)
- Define Dispersive power of grating. (2 marks, 2025, Diffraction Grating)
Unit 4: Fiber Optics and Laser – AKTU PYQs
- Differentiate between spontaneous emission and stimulated emission of radiation. (2 marks, 2026, Laser Fundamentals)
- Explain the role of population inversion in laser action. (2 marks, 2026, Laser Fundamentals)
- What is the difference between step index fibre and graded index fibre? Explain with suitable diagrams. Also discuss the mechanism of light propagation in both types of optical fibres. (7 marks, 2026, Optical Fiber Basics)
- Describe the construction and working principle of a He-Ne laser with the help of a suitable diagram. (7 marks, 2026, Types of Lasers)
- What are the sources of attenuation of signal in an optical fibre? Explain. (7 marks, 2026, Fiber Optic Communication)
Unit 5: Superconductors and Nano-Materials – AKTU PYQs
- State any two important properties of quantum dots and mention their significance. (2 marks, 2026, Nanomaterials Introduction Properties)
- What is meant by persistent current? (2 marks, 2026, Superconductivity Basics)
- Explain Type-I and Type-II superconductors. (7 marks, 2026, Types of Superconductors)
- What is the critical magnetic field? How does it vary with temperature? Critical temperature of superconductor when no magnetic field is applied is Tc. Find the temperature at which the critical field becomes half of its value at 0 K. (7 marks, 2026, Superconductivity Basics)
- Explain the method of preparation of Nanomaterials (i) Sol-Gel method and (ii) Chemical Vapour Deposition methods in detail. (7 marks, 2026, Fabrication of Nanomaterials)