BT-201 RGPV B.Tech
Engineering Physics (EP)
Previous year papers and the official syllabus are free to read, no account needed.
Previous Year Papers
8 papers, latest Dec 2025
- BT-201 paper, Dec 2025
- BT-201 paper, Jun 2025
- BT-201 paper, Dec 2024
- BT-201 paper, Jun 2024
- BT-201 paper, Dec 2023
- BT-201 paper, Jun 2023
Syllabus, notes and important questions for BT-201
Syllabus units
Topics as the official RGPV syllabus lists them.
Unit 1 Wave nature of particles and the Schrödinger equation 10 topics
- Introduction to quantum mechanics
- Wave nature of particles
- Operators
- Time‑dependent Schrödinger equation
- Time‑independent Schrödinger equation
- Particle in a one‑dimensional box
- Born interpretation
- Free‑particle wavefunction and wave‑packets
- Group velocity $v_g$ and phase velocity $v_p$
- Uncertainty principle
Unit 2 Wave optics 9 topics
- Huygens’ principle
- Superposition of waves and interference (wave‑front and amplitude splitting)
- Young’s double‑slit experiment
- Newton’s rings
- Michelson interferometer
- Mach‑Zehnder interferometer
- Fresnel diffraction from a single slit and circular aperture
- Rayleigh criterion and its application to vision
- Diffraction gratings and resolving power
Unit 3 Introduction to solids 10 topics
- Free electron theory of metals
- Intrinsic and extrinsic Fermi levels
- Density of states
- Bloch’s theorem for periodic potentials
- Kronig‑Penney model (conceptual)
- Origin of energy bands
- $V$‑$I$ characteristics of $p\!\-\!n$ junction
- Zener diode behavior
- Solar cell principles
- Hall effect
Unit 4 Lasers 7 topics
- Einstein coefficients $A$ and $B$
- Population inversion and light amplification
- Gas lasers (He‑Ne, CO$_2$)
- Solid‑state lasers (ruby, Nd:YAG)
- Properties of laser beams: monochromaticity, coherence, directionality, brightness
- Laser speckles and applications
- Optical fiber basics: acceptance angle, numerical aperture, $V$‑number, attenuation
Unit 5 Electrostatics in vacuum 9 topics
- Electric field and electrostatic potential for charge distributions
- Electric displacement $\mathbf{D}$
- Introduction to dielectrics
- Vector calculus: gradient, divergence, curl
- Stokes’ theorem
- Gauss’s law
- Continuity equation for current density
- Maxwell’s equations in vacuum and non‑conducting media
- Poynting vector $\mathbf{S}$
Exam insights
Counted from 6 past BT-201 papers.
Marks asked per paper, by unit
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Unit 1 Wave nature of particles and the Schrodinger equation 21 marks
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Unit 2 Wave optics 22 marks
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Unit 3 Introduction to solids 20 marks
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Unit 4 Lasers 23 marks
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Unit 5 Electrostatics in vacuum 16 marks
Average marks of the questions from each unit in one paper. You answer only some of them, so the total is more than the paper’s maximum.
Asked again and again
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Derive the equation of continuity for current density from the principle of charge conservation, stating assumptions, and explain its significance.
Asked 4 times: 2025, 2024, 2023, 2022
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State and prove/explain Heisenberg's uncertainty principle in detail.
Asked 4 times: 2024, 2023, 2022
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Explain the construction and working principle of the Mach-Zehnder interferometer with a suitable ray diagram.
Asked 3 times: 2025, 2023, 2022