AKTU Engineering Physics · Important Questions 2026Source: ryzenstudy.com PYQs
BAS101 Engineering Physics Important Questions 2026 (AKTU)
Repeat analysis + most-asked questions, unit-wise
What we did: built from all 9 AKTU Engineering Physics papers (2021-22 (Sem 1)–2025-26): 206 questions grouped into 99 distinct questions, 43 of which were asked in more than one paper.
- of marks were repeat questions
- 61%
- of marks were repeat questions
- questions asked in 2+ papers
- 43
- questions asked in 2+ papers
- papers analysed (2021-22 (Sem 1)–2025-26)
- 9
- papers analysed (2021-22 (Sem 1)–2025-26)
- units, mapped to current syllabus
- 5
- units, mapped to current syllabus
How much of the paper repeats?
- Repeats are real: when we checked each newer BAS101 paper against the papers before it, on average 61% of its marks were questions already asked in an earlier paper.
- 2022-23 (Sem 1) paper: 46% of marks were repeats (6 of 9 repeated questions were in our top list).
- 2022-23 (Sem 2) paper: 21% of marks were repeats (4 of 5 repeated questions were in our top list).
- 2023-24 (Sem 1) paper: 56% of marks were repeats (4 of 11 repeated questions were in our top list).
- 2023-24 (Sem 2) paper: 54% of marks were repeats (8 of 12 repeated questions were in our top list).
- 2024-25 (Sem 1) paper: 83% of marks were repeats (14 of 19 repeated questions were in our top list).
- 2024-25 (Sem 2) paper: 75% of marks were repeats (10 of 16 repeated questions were in our top list).
- 2025-26 paper: 89% of marks were repeats (9 of 19 repeated questions were in our top list).
- Topic weightage is a guide, not a guarantee: our Tier 1 + Tier 2 topics covered 64% of the next paper's marks — picking the same number of topics at random would have covered about 50%.
Across 10 subjects and 23 papers we tested, 43% of marks repeated earlier questions on average.
1.Unit-wise most-asked questions
Ranked by how many papers asked them, then by how recently. Click a paper to open it.
Unit 1: Quantum Mechanics
21% of past marks| Question | Asked |
|---|---|
| Write and solve the Schrödinger wave equation for a particle in a one-dimensional infinite potential box and obtain its eigenfunctions and eigenvalues | Asked 5× |
| Derive change in wavelength in Compton scattering. Why Compton effect is not observed for visible light? | Asked 5× |
| Describe the Davisson–Germer experiment with a neat diagram. How does this experiment verify de Broglie’s hypothesis of matter waves? | Asked 3× |
| Explain the concept of black body radiation and state the main features of Planck’s radiation law | Asked 3× |
Unit 2: Electromagnetic Field Theory
21% of past marks| Question | Asked |
|---|---|
| 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 | Asked 6× |
| State and Prove Poynting theorem | Asked 6× |
| State the physical significance of displacement current in Maxwell’s equations | Asked 3× |
| distance of 5m from the lamp | Asked 3× |
Unit 3: Wave Optics
23% of past marks| Question | Asked |
|---|---|
| Derive the conditions of Maxima & Minima in reflected light in a thin film of uniform thickness | Asked 4× |
| 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 | Asked 4× |
| Explain Rayleigh’s criterion of resolution | Asked 4× |
| 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 | Asked 2× |
Unit 4: Fiber Optics & Laser
21% of past marks| Question | Asked |
|---|---|
| Explain the construction and working principle of an optical fiber. Define acceptance angle and numerical aperture, and derive the relation between them | Asked 5× |
| Describe the construction and working principle of a He-Ne with the help of a suitable diagram | Asked 4× |
| What are the sources of attenuation of signal in an optical fibre? Explain | Asked 4× |
| Explain the role of population inversion in laser action | Asked 4× |
Unit 5: Superconductors and Nano-Materials
14% of past marks| Question | Asked |
|---|---|
| What is meant by persistent current? | Asked 6× |
| Explain Type-I and Type-II superconductors | Asked 4× |
| Explain the method of preparation of Nanomaterials (i) Sol-Gel method and (ii) Chemical Vapour Deposition methods in detail | Asked 4× |
| Discuss the term Quantum Well and Quantum Wire | Asked 3× |
2.Topic weightage: which topics carry the marks
Blue = Tier 1 + Tier 2 (topics that carried ~80% of past marks). Grey = the rest. It shows where marks have gone, not a promise of what comes next.
Poynting vector and Poynting theorem · U2
6.6% (cum 7%)
Acceptance angle and numerical aperture · U4
5.4% (cum 12%)
Newton's Rings and its applications · U3
5% (cum 17%)
Particle in a one-dimensional box · U1
5% (cum 22%)
Plane electromagnetic waves in vacuum · U2
4.7% (cum 27%)
Compton effect · U1
4.4% (cum 31%)
Population inversion and Einstein's coefficients · U4
4.3% (cum 35%)
Interference in uniform thin films · U3
3.9% (cum 39%)
Ruby laser and He-Ne laser · U4
3.8% (cum 43%)
Displacement current · U2
3.6% (cum 47%)
Meissner effect and persistent current · U5
3.5% (cum 50%)
Dispersive power and resolving power · U3
3.5% (cum 54%)
Fraunhoffer diffraction at single slit · U3
3.4% (cum 57%)
Planck's black body radiation theory · U1
3% (cum 60%)
Type I and Type II superconductors · U5
3% (cum 63%)
Attenuation and dispersion · U4
2.6% (cum 66%)
Davisson and Germer Experiment · U1
2.3% (cum 68%)
Coherent sources · U3
2.1% (cum 70%)
Step index and graded index fibers · U4
2% (cum 72%)
Top-Down (CVD) and Bottom-Up (Sol Gel) · U5
2% (cum 74%)
Skin depth · U2
2% (cum 76%)
Quantum dots, wires and wells · U5
1.9% (cum 78%)
Phase velocity and group velocity · U1
1.8% (cum 80%)
Diffraction grating and spectra · U3
1.8% (cum 82%)
Time-independent Schrodinger wave equation · U1
1.8% (cum 83%)
Temperature dependence of critical field · U5
1.7% (cum 85%)
Physical interpretation of wave function · U1
1.6% (cum 87%)
Spontaneous and stimulated emission · U4
1.3% (cum 88%)
Wedge shaped thin films · U3
1.3% (cum 89%)
Fraunhoffer diffraction at double slit · U3
1.2% (cum 90%)
Absent spectra · U3
1.2% (cum 92%)
Maxwell equations in vacuum · U2
1.1% (cum 93%)
Maxwell equations integral and differential form · U2
1% (cum 94%)
Continuity equation for current density · U2
0.9% (cum 95%)
Properties and applications of nano materials · U5
0.9% (cum 96%)
Inadequacy of classical mechanics · U1
0.7% (cum 96%)
Stoke's and Divergence theorem · U2
0.7% (cum 97%)
Fiber optic communication principle · U4
0.7% (cum 98%)
High temperature superconductors · U5
0.7% (cum 98%)
de-Broglie concept of matter waves · U1
0.6% (cum 99%)
Introduction and properties of nano materials · U5
0.6% (cum 100%)
Principle and construction of optical fiber · U4
0.3% (cum 100%)
| Topic | Papers | Share |
|---|---|---|
| Poynting vector and Poynting theorem · Unit 2 · Tier 1 | 8/9 | 6.6% |
| Acceptance angle and numerical aperture · Unit 4 · Tier 1 | 7/9 | 5.4% |
| Newton's Rings and its applications · Unit 3 · Tier 1 | 7/9 | 5% |
| Particle in a one-dimensional box · Unit 1 · Tier 1 | 8/9 | 5% |
| Plane electromagnetic waves in vacuum · Unit 2 · Tier 1 | 6/9 | 4.7% |
| Compton effect · Unit 1 · Tier 1 | 7/9 | 4.4% |
| Population inversion and Einstein's coefficients · Unit 4 · Tier 1 | 7/9 | 4.3% |
| Interference in uniform thin films · Unit 3 · Tier 1 | 6/9 | 3.9% |
| Ruby laser and He-Ne laser · Unit 4 · Tier 1 | 7/9 | 3.8% |
| Displacement current · Unit 2 · Tier 1 | 6/9 | 3.6% |
| Meissner effect and persistent current · Unit 5 · Tier 1 | 6/9 | 3.5% |
| Dispersive power and resolving power · Unit 3 · Tier 2 | 5/9 | 3.5% |
| Fraunhoffer diffraction at single slit · Unit 3 · Tier 2 | 4/9 | 3.4% |
| Planck's black body radiation theory · Unit 1 · Tier 2 | 8/9 | 3% |
| Type I and Type II superconductors · Unit 5 · Tier 2 | 4/9 | 3% |
| Attenuation and dispersion · Unit 4 · Tier 2 | 5/9 | 2.6% |
| Davisson and Germer Experiment · Unit 1 · Tier 2 | 4/9 | 2.3% |
| Coherent sources · Unit 3 · Tier 2 | 4/9 | 2.1% |
| Step index and graded index fibers · Unit 4 · Tier 2 | 4/9 | 2% |
| Top-Down (CVD) and Bottom-Up (Sol Gel) · Unit 5 · Tier 2 | 4/9 | 2% |
| Skin depth · Unit 2 · Tier 2 | 5/9 | 2% |
| Quantum dots, wires and wells · Unit 5 · Tier 2 | 5/9 | 1.9% |
| Phase velocity and group velocity · Unit 1 · Tier 2 | 4/9 | 1.8% |
| Diffraction grating and spectra · Unit 3 · Tier 3 | 4/9 | 1.8% |
| Time-independent Schrodinger wave equation · Unit 1 · Tier 3 | 3/9 | 1.8% |
| Temperature dependence of critical field · Unit 5 · Tier 3 | 3/9 | 1.7% |
| Physical interpretation of wave function · Unit 1 · Tier 3 | 3/9 | 1.6% |
| Spontaneous and stimulated emission · Unit 4 · Tier 3 | 4/9 | 1.3% |
| Wedge shaped thin films · Unit 3 · Tier 3 | 2/9 | 1.3% |
| Fraunhoffer diffraction at double slit · Unit 3 · Tier 3 | 2/9 | 1.2% |
| Absent spectra · Unit 3 · Tier 3 | 2/9 | 1.2% |
| Maxwell equations in vacuum · Unit 2 · Tier 3 | 2/9 | 1.1% |
| Maxwell equations integral and differential form · Unit 2 · Tier 3 | 2/9 | 1% |
| Continuity equation for current density · Unit 2 · Tier 3 | 2/9 | 0.9% |
| Properties and applications of nano materials · Unit 5 · Tier 3 | 2/9 | 0.9% |
| Inadequacy of classical mechanics · Unit 1 · Tier 3 | 1/9 | 0.7% |
| Stoke's and Divergence theorem · Unit 2 · Tier 3 | 1/9 | 0.7% |
| Fiber optic communication principle · Unit 4 · Tier 3 | 1/9 | 0.7% |
| High temperature superconductors · Unit 5 · Tier 3 | 1/9 | 0.7% |
| de-Broglie concept of matter waves · Unit 1 · Tier 3 | 2/9 | 0.6% |
| Introduction and properties of nano materials · Unit 5 · Tier 3 | 1/9 | 0.6% |
| Principle and construction of optical fiber · Unit 4 · Tier 3 | 1/9 | 0.3% |
3.Paper pattern (2025-26)
| Section | Questions | Rule |
|---|---|---|
| A | 7 × 2 marks | Attempt all |
| B | 5 × 7 marks | Attempt any 3 |
| C | 10 × 7 marks | Attempt any 1 |
4.In the syllabus, never asked yet
Low priority, but read them once — a new paper can always start here.
- Time-dependent Schrodinger wave equation · U1
- Basic laws of electricity and magnetism · U2
- Transverse nature of electromagnetic waves · U2
- Necessity of extended sources · U3
- Absorption of radiation · U4
- Laser applications · U4
- Temperature dependence of resistivity · U5
- Properties and applications of superconductors · U5
5.Study order
- 1Poynting vector and Poynting theorem (Unit 2, Tier 1)
- 2Acceptance angle and numerical aperture (Unit 4, Tier 1)
- 3Newton's Rings and its applications (Unit 3, Tier 1)
- 4Particle in a one-dimensional box (Unit 1, Tier 1)
- 5Plane electromagnetic waves in vacuum (Unit 2, Tier 1)
- 6Compton effect (Unit 1, Tier 1)
- 7Population inversion and Einstein's coefficients (Unit 4, Tier 1)
- 8Interference in uniform thin films (Unit 3, Tier 1)
- 9Ruby laser and He-Ne laser (Unit 4, Tier 1)
- 10Displacement current (Unit 2, Tier 1)
- 11Meissner effect and persistent current (Unit 5, Tier 1)
- 12Dispersive power and resolving power (Unit 3, Tier 2)
- 13Fraunhoffer diffraction at single slit (Unit 3, Tier 2)
- 14Planck's black body radiation theory (Unit 1, Tier 2)
- 15Type I and Type II superconductors (Unit 5, Tier 2)
- 16Attenuation and dispersion (Unit 4, Tier 2)
- 17Davisson and Germer Experiment (Unit 1, Tier 2)
- 18Coherent sources (Unit 3, Tier 2)
- 19Step index and graded index fibers (Unit 4, Tier 2)
- 20Top-Down (CVD) and Bottom-Up (Sol Gel) (Unit 5, Tier 2)
- 21Skin depth (Unit 2, Tier 2)
- 22Quantum dots, wires and wells (Unit 5, Tier 2)
- 23Phase velocity and group velocity (Unit 1, Tier 2)
FAQ
Which units of BAS101 carry the most marks?
Unit 3 (Wave Optics, 23% of past marks) and Unit 1 (Quantum Mechanics, 21% of past marks).
Do AKTU Engineering Physics questions repeat?
Yes. On average 61% of the marks in each newer BAS101 paper came from questions already asked in an earlier paper, and 43 questions have appeared in more than one paper.
How is this list made?
Every question from the 9 papers (2021-22 (Sem 1)–2025-26) was mapped to the current AKTU syllabus and grouped with the same question from other years. Questions are ranked by how many papers they appeared in, then by how recently.
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Note: this is based on past AKTU papers, not a guarantee. Questions are mapped to the current syllabus; topics that are no longer in the syllabus are left out.