(SEM II) THEORY EXAMINATION 2021-22 ENGINEERING PHYSICS

B.Tech Physics 0 downloads

₹29.00

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