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ENGINEERING PHYSICS | B.Tech (Semester II) | KAS201T
Theory Examination 2021–22 – Full Question Paper Overview
This document contains the official and complete B.Tech (Semester II) Theory Examination Question Paper for Engineering Physics (Subject Code: KAS201T) for the academic session 2021–22. The paper is structured to test a student’s conceptual understanding, mathematical skills, analytical ability, and application-level knowledge across the core areas of engineering physics.
It includes questions on relativity, electromagnetic waves, quantum mechanics, diffraction, optical fibers, lasers, and classical wave phenomena—ensuring coverage of the entire syllabus through both conceptual and numerical problems.
The paper is divided into three major sections, each designed to measure different levels of competence.
SECTION A – Short Answers (10 × 2 = 20 Marks)
This section contains ten brief questions that check foundational concepts from different units of Engineering Physics.
Topics covered include:
Frame of reference in motion
Proof that massless particles travel at the speed of light
Energy flow in electromagnetic waves
Skin depth at high and low frequencies
Compton effect and Compton shift
Perfect absorbers and black body radiation
Dark center in Newton’s rings
Rayleigh criterion of resolution
Acceptance angle & numerical aperture of optical fibers
Spontaneous vs stimulated emission
These short questions ensure that students have clarity about essential physics principles.
SECTION B – Descriptive / Numerical Questions (3 × 10 = 30 Marks)
Students must attempt any three questions. These require detailed calculation steps, derivations, and conceptual explanations.
Core topics include:
Special Theory of Relativity and Lorentz Transformation
Intensity of electric & magnetic fields from a radiating source
Energy levels of a particle in a one-dimensional rigid box
Newton’s Rings—calculation of radius of curvature
Step-index optical fiber – cutoff parameter & number of modes
This section tests numerical ability, formula application, and theoretical understanding.
SECTION C – Long Analytical Questions (4 × 10 = 40 Marks)
Each subsection requires answering one full-length question, covering deeper mathematical derivations and advanced concepts.
Topics include:
Relativity & Mass-Energy
Michelson–Morley Experiment
Derivation of Einstein’s mass–energy relation E=mc2E = mc^2E=mc2
Electromagnetic Wave Theory
Maxwell’s equations in free space
Transverse nature of EM waves
Radiation pressure and momentum
Quantum Mechanics
Physical significance of wave function
Schrödinger Time-Independent Equation
Compton effect and Compton shift derivation
Interference & Diffraction
Rayleigh criterion and resolving power of grating
Fraunhofer diffraction at a single slit and intensity distribution
Optical Fiber Communication & Lasers
Critical angle, numerical aperture, acceptance angle
Population inversion and working of Ruby laser
These questions determine a student's mastery of advanced engineering physics concepts.
Sample Questions (1–2 from the paper as you requested)
Sample Question 1 (Section A):
“What is Compton effect and Compton shift?”
— A conceptual question testing understanding of photon-electron scattering.
Sample Question 2 (Section C):
“What was the object of conducting Michelson–Morley experiment? Illustrate the experiment with diagram and give outcomes.”
— A deep analytical question involving derivation and physical interpretation.
These examples reflect the overall pattern and depth of questions in the paper.
Overall Topics Covered in the Question Paper
Relativity
Lorentz transformations
Mass–energy relation
Michelson–Morley experiment
Electromagnetic Waves
Maxwell’s equations
Poynting vector, energy flow, radiation pressure
Quantum Physics
Schrödinger equation
Particle in a box
Compton effect
Wave function interpretation
Optics
Newton’s Rings
Rayleigh criterion
Diffraction (single slit)
Fiber Optics
Numerical aperture
Acceptance angle
Modes of propagation
Refractive index profile
Lasers
Stimulated vs spontaneous emission
Population inversion
Ruby laser working
The question paper covers the full prescribed syllabus in a structured manner, balancing theory, numerical problems, and derivations.