Solved question paper for PHYSICS May-2025 (B-TECH 1st-2nd)
Solved Question Paper
Engineering physics May-2025
PTU • B-TECH • Mechanical Engineering • 1st-2nd • May-2025
engineering physics previous year question papers on BRpaper are organized for students of Punjab Technical University’s Bachelor of Technology program, 1st-2nd semester. This section makes it easier to browse subject-wise old question papers for engineering physics, so students can review how questions are typically framed in past exams and get a sense of the exam pattern. Many students search for engineering physics with answers pdf while preparing for exams, and this page is built to support exactly that kind of subject-wise browsing and revision. BRpaper is not the official website of Punjab Technical University or any institution, and it does not publish official notices or academic updates.
PART A
1. EM waves & Dielectrics:
Physical significance of Gradient, Divergence & Curl, Relationship between Electric Field & Potential, Dielectric polarization, displacement Current, Types of polarization, Maxwell‟s Equations, Equation of EM waves in free space, velocity of EM waves, Poynting vector, Electromagnetic Spectrum ( Basic ideas of different region).
2. Magnetic Materials & Superconductivity:
Basic ideas of Dia, Para, Ferro & Ferri, Ferrites, Magnetic Anisotropy, Magnetostriction its applications in production of Ultrasonic waves, Superconductivity, Superconductors as ideal diamagnetic materials, Signatures of Superconducting state, Meissner Effect, Type I & Type II superconductors, London Equations, Introduction to BCS theory.
3. Elements of crystallography:
Unit cell, Basis, Space lattice, Crystal Systems, Miller Indices of Planes & Directions in cubic system, Continuous & Characteristic X-Rays, X-Ray Diffraction & Bragg‟s law in Crystals, Bragg‟s spectrometer, X-ray radiography.
4. Lasers:
Spontaneous & Stimulated emissions, Einstein‟s Coefficients, Population Inversion, Pumping Mechanisms, Components of a laser System, Three & four level laser systems; Ruby, He-Ne, CO2 and semiconductor Lasers, Introduction to Holography.
PART B
5. Fibre Optics:
Introduction, Acceptance Angle, Numerical Aperture, Normalized frequency, Modes of propagation, material dispersion & pulse broadening in optical fibres, fibre connectors, splices and couplers, applications of optical fibres.
6. Special Theory of Relativity:
Concept of Ether, Michelson Morley Experiment, Einstein‟s postulates, Lorentz transformation equations; length, time and simultaneity in relativity, addition of velocity, variation of mass with velocity, Mass-Energy and Energy-momentum relations.
7. Quantum Theory:
Need and origin of quantum concept, Wave-particle duality, Matter waves, Group & Phase velocities, Uncertainty Principle, Significance & normalization of wave function, Schrodinger wave equation: time independent & dependent, Eigen functions & Eigen values, particle in a box.
8. Nanophysics:
Nanoscale, surface to volume ratio, electron confinement, nanoparticles (1D, 2D, 3D), Nanomaterials, Unusual properties of nanomaterials, synthesis of nanomaterials- ball milling and sol-gel techniques, Carbon nanotubes (synthesis and properties), applications of nanomaterials.
Solved Questions
Solved-
Write briefly : a. Calculate the minimum wavelength of Continuous X-rays emitted from an X-ray tube whose operating voltage is 40 kV.Very Short Answer 2 Marks May-2025 • PTU B-TECH
-
May 2024 Explain the measurement of wavelength of X-ray using Brage\'s spectrometer. Calculate the minimum wavelength of continuous X-rays emitted from a: X-ray tube whose operating voltage is 40 kV,
-
-
Write briefly : b. Show that at 0 K, the probability to find electron in an energy level above the fermi level is Zero.Very Short Answer 2 Marks May-2025 • PTU B-TECH
-
May 2024 Show that at 0 K, the probability of finding an electron in an energy level below the fermi level is 1.
-
-
Write briefly : c. Why superconductors cannot carry current beyond a certain limit?Very Short Answer 2 Marks May-2025 • PTU B-TECH
-
Write briefly : d. Distinguish between diamagnetic and paramagnetic materials.Very Short Answer 2 Marks May-2025 • PTU B-TECH
-
Write briefly : e. Show that Divergence of Curl of vector is zero.Very Short Answer 2 Marks May-2025 • PTU B-TECH
-
May 2015 Show that divergence of curl of a vector field always vanishes.
-
-
Write briefly : f. Distinguish between Stimulated emission and spontaneous emission.Very Short Answer 2 Marks May-2025 • PTU B-TECH
-
Dec 2023 Write briefly:\r\ne) Differentiate between spontaneous & stimulated emission.
-
-
Write briefly : g. Write a note on four level lasers.Very Short Answer 2 Marks May-2025 • PTU B-TECH
-
Write briefly : h. What are Carbon Nanotubes (CNTs)?Very Short Answer 2 Marks May-2025 • PTU B-TECH
-
Dec 2023 Write short notes on: i) What are Carbon Nanotubes (CNTs)?
-
May 2015 Write a short note on carbon nanotubes. (5, 3)
-
Dec 2014 Write a short note on carbon nanotubes. ---:END:---
-
-
An electron has a speed of 400 m/s, correct upto 0.01%, with what minimum accuracy, can you locate the electron?
Short Answer 2 Marks May-2025 • PTU B-TECH-
May 2024 An electron has a speed of 500 m/s, correct upto 0.01%, with what minimum accuracy, can you locate the electron? 1] m-937%4 ($1)-390
-
-
Distinguish between splicers and couplers.Very Short Answer 2 Marks May-2025 • PTU B-TECH
-
What is Bragg's law? Explain the measurement of crystal spacing (d) using Bragg's spectrometer.Long Answer 8 Marks May-2025 • PTU B-TECH
-
Distinguish between intrinsic and extrinsic semiconductors. Derive the expression for carrier concentration in n-type semiconductors.Long Answer 8 Marks May-2025 • PTU B-TECH
-
What is Meissner effect? Explain it using London's equation.Long Answer 8 Marks May-2025 • PTU B-TECH
-
Dec 2023 What is Meissner effect? Explain it using London equations.
-
-
a. Write the Maxwell's equations and discuss the physical significance of each equation.Long Answer 8 Marks May-2025 • PTU B-TECH
-
Dec 2023 a) Write the Maxwell\\\'s equations and discuss the physical significance of each equation.
-
May 2019 Derive all Maxwell’s equations in free space and explain their physical significance.
-
May 2018 Write Maxwell’s four equations of electromagnetic theory and briefly interpret each of them. (4)
-
May 2017 Write Maxwell\'s equations in integral form and attach physical significance to each of them.
-
Dec 2017 Write Maxwell\'s four equations of electromagnetic theory and briefly interpret each of them.
-
May 2016 Write Maxwell’s four equations of electromagnetic theory and briefly interpret each of them. (4)
-
Dec 2014 Write Maxwell’s equations in differential form and give their physical significance
-
May 2011 Write down maxwell equations and explain their significance.
-
Dec 2011 Write down the four Maxwell\'s equa tions in differential form. Discuss the significance of each. Explain Maxwell\'s modification of Ampere\'s law.
-
Dec 2010 Write down Maxwell\'s equations and explain their physical significance.
-
Dec 2008 Give the physical significance of Maxwell\'s equations.
-
Dec 2005 Write maxwells equations. Explain the physic al significance of each equation.
-
-
b. Define Poynting vector (\(\vec{P}\)). Show that \(\vec{P} = \langle \vec{E} \times \vec{H}\rangle\) where symbols have their usual meanings.Long Answer 8 Marks May-2025 • PTU B-TECH
-
Explain the construction and working of Ruby laser with the help of energy level diagram. Explain why it is pulsed laser?Long Answer 8 Marks May-2025 • PTU B-TECH
-
Dec 2023 b) Discuss the construction, working and energy level diagram of Ruby laser.
-
May 2018 Describe the working of Ruby laser with proper energy level diagram. (5)
-
May 2015 Discuss the construction and working of a ruby laser.
-
Dec 2014 Discuss the construction and working of a ruby laser.
-
Dec 2009 Explain the working, construction and energy level diagram for Ruby laser.
-
Dec 2008 Explain the construction, working and principle of Ruby Laser.
-
-
What are the various kinds of losses a light suffers while propagating through a fibre? Calculate the refractive index of core and clad of fibre where Numerical aperture is 0.40 and \(\Delta = 0.020\).Long Answer 8 Marks May-2025 • PTU B-TECH
-
Solve time independent Schrodinger wave equation for particle in a box and show that energy of particle is quantized.Long Answer 8 Marks May-2025 • PTU B-TECH
-
Explain the synthesis of nanomaterials using sol-gel techniques. Why it is called bottom to top approach?Long Answer 8 Marks May-2025 • PTU B-TECH
Explore all data
FAQ
Frequently Asked Questions
Answers about this subject, solved papers, and preparation.
01 Where can I find engineering physics previous year question papers for Bachelor of Technology, 1st-2nd semester?
This page lists engineering physics question papers uploaded for Punjab Technical University Bachelor of Technology, 1st-2nd semester, organized for subject-wise browsing where available.
02 Are these official Punjab Technical University question papers?
BRpaper is not the official website of Punjab Technical University. These papers are shared for reference and revision purposes only and are not official university material.
03 How can previous year engineering physics papers help in exam preparation?
Reviewing past papers can help you understand how questions are typically framed, notice commonly repeated topics, and get a sense of the exam pattern before your own exam.
04 What kind of topics does engineering physics usually cover?
The question papers here relate to the official engineering physics syllabus set by the university for this course and semester.
05 Does this page include a engineering physics with answers pdf or solved answers?
This page focuses on providing access to the previous year question papers themselves. A separate question bank or solved answers may not be available for every paper.
06 Can I find papers for other subjects in the same Bachelor of Technology?
Yes, BRpaper organizes papers by university, course, stream, and semester, so you can browse other subjects within the same Punjab Technical University Bachelor of Technology.