Solved question paper for PHYSICS May-2011 (B-TECH 1st-2nd)
Solved Question Paper
Engineering physics May-2011
PTU • B-TECH • Mechanical Engineering • 1st-2nd • May-2011
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-
Selecting atleast Two questions from Section B & C. Q1) a) b) c) d) e) D c) h) ,) ) Section - A (2 morks each) Define remanence and coercivity. Explain the term metastable state and its significance. Explain the term normalized frequency. Give examples ofsolenoidal and irrotational fields. What is the r6st mass of photon. Why we X - rays only for crystal structure determination? How does the result ofquantum mechanics differ from those ofclassical mechanics in harmonic oscillator. what is the difference between perfect diamagnet and superconductor? What effect does the target metal have on the continuous x _ ray spectrum? What is the de - broglie concept of matter waves? Section _ B Using Gauss's law of electrostatics, find the electric field due to auniformly charged solid sphere at a point, which is lying outside thesphere. Iir an electic field the electic potential is given by U(a y, z) = (4f + 3f + g*fro . Calculatetheelectric fieldatpoint(l I l).Short Answer May-2011 • PTU B-TECH
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R-r268 P,TO.Short Answer May-2011 • PTU B-TECH
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Briefly describe the phenomenon ofmagnetic hysteresis and why it occurs for ferromagnetic and ferrimagnetic materials'Short Answer May-2011 • PTU B-TECH
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Dec 2019 Explain the hysteresis curve shown by ferromagnetic materials on basis of domain theory.
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Dec 2008 Explain the terms magnetostriction effect, hard magnetic materials, hysteresis loss.
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What is the difference between soft and hard magnetic materials' 20 @) Explainthetermfollowingterms:Short Answer May-2011 • PTU B-TECH
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Dec 2017 Discuss the complete classification of magnetic materials. What are the differences between soft and hard magnetic materials?
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May 2005 What do you understand by magnetic materials? Wh at are differences between hard and soft magnetic materials?
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Dec 2005 What is difference between soft and hard magne tic materials?
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PoPulationinversion'Short Answer May-2011 • PTU B-TECH
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Semiconductorlaser,Short Answer May-2011 • PTU B-TECH
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HolograPhY.Short Answer May-2011 • PTU B-TECH
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The light of wavelength 660 nm has a wave train of length I 3'2 x 10{m' Calculate the coherent time'Short Answer May-2011 • PTU B-TECH
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Find the core radius necessary for single mode operation at 820 nm of a step index fibre with nr= l'480 and n, = l'478'Short Answer May-2011 • PTU B-TECH
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May 2012 Find the core radius necessary for single mode operation at 800 nm in step index fibre with n l = 1.48 and n 2 = 1.47. Also find the Numerical Aperture and maximum acceptance angle.
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Differentiate between material dispersion and pulse dispersion' Write down various types of losses in optical fibre'Short Answer May-2011 • PTU B-TECH
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An electron is moving with a speed of 0'9c' Calculate its total energy and findthe ratio ofNewtoniankinitic enerryto the relativistic kinetic energy.Short Answer May-2011 • PTU B-TECH
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Describe Michelson Morley experiment and show the negative results obtained from this experiment were interpreted'Short Answer May-2011 • PTU B-TECH
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May 2018 Discuss relevance of Michelson Morley experiment in reference to special theory of relativity.
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May 2017 Give the results of the Michelson-Morley experiment.
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May 2015 Discuss the Michelson-Morley experiment and give its conclusions.
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Dec 2009 Explain Michelson Morley experiment and discuss its significance.
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May 2008 Explain Michelson-Morley experiment in detail and give the significance of negative results
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Calculate the wavelength of X - rays produced when the potential difference is 12400 volts'Short Answer May-2011 • PTU B-TECH
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Differentiate between characteristic and continuous X - rays' Give some industrial and engineering applications ofX - rays'Short Answer May-2011 • PTU B-TECH
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What is Moseley's law? Give its applications' QB) (a) Derive an expression for the time independent Schrddinger wave equation'Short Answer May-2011 • PTU B-TECH
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An electron.is bound by potential which closely approaches an infinite . square wett of wiatn Z'i * I g-'0 "'' tu'"ulate the lowest three permissible quantum energies the electron can have'Short Answer May-2011 • PTU B-TECH
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What do you understand by type - I and type - II superconductors? Explain with examPles.Short Answer May-2011 • PTU B-TECH
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May 2023 What is superconductivity? Discuss Type-I and Type-II superconductors.
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Dec 2023 Mention different types of superconductors. How type-II superconductor differs from type-I superconductor?
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Dec 2023 Write short notes on: c) What are Type I and Type II Superconductors?
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Dec 2020 Differentiate between Type - I & Type - II superconductors.
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May 2019 What are Type I and Type II superconductors?
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Dec 2019 What are Type-I and Type-II superconductors?
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May 2018 What do you understand by type I superconductors?
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May 2017 What are type I and type II superconductors and give their distinguishing features. 3
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May 2017 What are type I and type II superconductors and give their distinguishing features. 3
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May 2017 What are type I and type II superconductors? Give their distinguishing characteristics. (4)
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Dec 2017 What do you mean by Meissner effect? Discuss Type I and Type II Superconductors. ( b) Give a quantitative explanation of BCS theory of superconductors. How does this theory explain major characteristics of superconductors?
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Dec 2016 What are type I superconductors?
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May 2015 Give a brief account of Type I and II superconductors. (4,4)
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May 2012 What are type II superconductors?
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May 2012 Differentiate between type I and type II superconductors. (5,3)
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Dec 2011 What is Meissner effect? Expl ain the difference between Type-I and Type-II superconductors.
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Dec 2010 Explain the deference between the Type I and Type II superconductors. \\\' (b) Give the salient features of BCS theory of superconductors.
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Dec 2005 What do you understand by type I and type II superconductors? Give the BCS theory of superconductivity.
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What are London equations? Find the expression for the penetration dePth of a suPerconductor' Q4) 0lll 2R-1268Short Answer May-2011 • PTU B-TECH
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May 2011 What are London equations? Find the expression for the penetration depth of a superconductor. Dtltr R-541 2
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01 Where can I find engineering physics previous year question papers for Bachelor of Technology, 1st-2nd semester?
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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.
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