Solved question paper for PHYSICS Dec-2019 (B-TECH 1st-2nd)
Solved Question Paper
Engineering physics Dec-2019
PTU • B-TECH • Civil Engineering • 1st-2nd • Dec-2019
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
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What is physical significance gradient of scalar field?Very Short Answer 2 Marks Dec-2019 • PTU B-TECH
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Dec 2014 What is the physical significance of gradient of a scalar field?
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Dec 2012 What is physical significance of gradient of a function?
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May 2008 What is the significance of gradient of a scalar?
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What does a Poynting vector measures?Very Short Answer 2 Marks Dec-2019 • PTU B-TECH
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Dec 2020 Give the expression for Poynting vector and its physical significance.
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May 2018 What is physical significance of Poynting vector?
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Dec 2014 What information does the quantity poynting vector furnish?
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What are Type-I and Type-II superconductors?Very Short Answer 2 Marks Dec-2019 • 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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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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May 2011 What do you understand by type - I and type - II superconductors? Explain with examPles.
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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 is meant by Critical temperature in context of superconductors?Very Short Answer 2 Marks Dec-2019 • PTU B-TECH
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May 2012 What do you understand by thermodynamics of superconductors? Comment of present status.
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May 2011 What are the conditions for a material to be a superconductor?
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Dec 2008 What do you mean by the term \'Field penetration\' in super conductors?
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May 2005 What is the effect of magnetic field on superconductivity?
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Why X-rays are suitable for studying crystal diffraction?Very Short Answer 2 Marks Dec-2019 • PTU B-TECH
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May 2018 Why only x-rays are used for the crystal structure studies?
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May 2016 Why only x-rays are used for the crystal structure studies?
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May 2014 Why are X-rays used for crystal structure analysis?
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Write two properties of laser beam.Very Short Answer 2 Marks Dec-2019 • PTU B-TECH
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Dec 2017 What are the characteristics of laser light?
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May 2014 Enumerate the important characteristics of a laser beam?
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What is role of cladding in the optical fibre?Very Short Answer 2 Marks Dec-2019 • PTU B-TECH
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What is meant by the relativity of simultaneity?Very Short Answer 2 Marks Dec-2019 • PTU B-TECH
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Dec 2017 What do you understand by simultaneity in relativity.
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Dec 2015 What do you understand by simultaneity of an event in the special theory of relativity?
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May 2014 What do you mean by relativity of simultaneity? Explain it with help of an example. (4) a?
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May 2012 What do you mean by simultaneity in relativity? (5,3)
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Show that a particle which travels with speed of light must have a zero rest mass.Very Short Answer 2 Marks Dec-2019 • PTU B-TECH
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Define Matter Wave associated with material particle.Very Short Answer 2 Marks Dec-2019 • PTU B-TECH
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a) What is meant by polarization of a material? Mention the different mechanism of polarization in a dielectric.Short Answer 4 Marks Dec-2019 • PTU B-TECH
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May 2016 Briefly discuss different dielectric polarization mechanisms. Also specify temperature dependence in each case. (4)
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Dec 2016 What are main characteristics of dielectric materials?
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May 2015 Discuss various polarizations induced in the dielectric when it is subjected to external electric field. (4,4)
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Dec 2014 Discuss various kinds of polarizations induced in the dielectric when it is subjected to external electric field.
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Dec 2011 Enumerate different polarization mechanisms in dielectrics?
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Dec 2005 What is dielectric polarization?
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Dec 2004 What is dielectric polarization?
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Explain the hysteresis curve shown by ferromagnetic materials on basis of domain theory.Long Answer 4 Marks Dec-2019 • PTU B-TECH
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May 2011 Briefly describe the phenomenon ofmagnetic hysteresis and why it occurs for ferromagnetic and ferrimagnetic materials\'
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Dec 2008 Explain the terms magnetostriction effect, hard magnetic materials, hysteresis loss.
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What is Meissner effect? Discuss the significance of this effect in context of superconductivity.Long Answer 4 Marks Dec-2019 • PTU B-TECH
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May 2010 What is Meissner effect? Further explain the effect of magnetic field on thc superconducting state.
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Define Atomic Packing fraction. Calculate the packing fraction for hexagonal close packed (hcp) unit cell?Long Answer 4 Marks Dec-2019 • PTU B-TECH
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Calculate the wavelength of an X-ray beam incident at 12° for the first order reflection from calcite crystal, if the grating constant of the crystal is 3.035 Å" (sin12° = 0.2079)Long Answer 4 Marks Dec-2019 • PTU B-TECH
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What is population inversion in laser and how it is achieved?Long Answer 4 Marks Dec-2019 • PTU B-TECH
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May 2017 What is population inversion and give its significance in lasing action?
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May 2017 What is population inversion and give its significance in lasing action?
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May 2015 What is population inversion and give its significance in lasing action?
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Describe the principle, construction and working of He-Ne laser.Long Answer 4 Marks Dec-2019 • PTU B-TECH
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Dec 2023 What is laser? Describe the principle, construction and working of He-Ne laser.
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May 2017 Discuss the construction and working of a He-Ne laser. (5)
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May 2014 Describe the construction and working of a He-Ne laser.
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May 2011 Differentiate between three level and four level lasers. Give the construction and working of He-Ne laser.
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May 2008 Explain the construction and working of He-Ne laser.
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Dec 2007 Explain the action of He-Ne laser. How it is superior to Ruby laser?
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Explain the basic principle used in optical fibre for transmission of light. What is acceptance angle for an optical fibre? How it is related to numerical aperture. Find out the numerical aperture and acceptance angle of an optical fibre, if the refractive indices for core and cladding are 1.6 and 1.5 respectively.Long Answer 4 Marks Dec-2019 • PTU B-TECH
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May 2017 What are different kinds of optical fibers ? How is light wave guided through an optical fiber? Derive and interpret the numerical aperture of an optical fiber. 5
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May 2017 What are different kinds of optical fibers ? How is light wave guided through an optical fiber? Derive and interpret the numerical aperture of an optical fiber. 5
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May 2017 What is an optical fiber ? Discuss the underlying principle of light guidance through optical fiber. Derive the expression for numerical aperture of optical fiber and attach physical significance to it. (5)
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May 2015 What is an optical f iber? Give the basic principle of light guidance through the optical fiber. Derive an expression for numerical aperture of an optical fiber.
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Write down the postulates of special theory of relativity. Derive Lorentz transformation equation.Long Answer 4 Marks Dec-2019 • PTU B-TECH
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Dec 2008 Derive Lorentz\'s transformation equations and apply thern to explain
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Dec 2005 Explain the postulates of theory of relativity and derive lorentz transformation equation.
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Derive an expression for the variation of mass with velocity. What inferences do you draw from it?Long Answer 4 Marks Dec-2019 • PTU B-TECH
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How Quantum mechanics is different from classical mechanics? Derive an expression for time independent Schrodinger wave equation.Long Answer 4 Marks Dec-2019 • PTU B-TECH
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Solve the Schrodinger wave equation for a particle having mass M confined to one dimensional infinite potential box of width L in order to obtain its eigen-values.Long Answer 4 Marks Dec-2019 • PTU B-TECH
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May 2014 Solve Schrodinger wave equation for a particle confined to an infinite potential box of width L in order to derive the expression for energy eigen-values. (5)
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Discuss Ball milling and Sol-gel methods for synthesis of nanoparticles.Long Answer 4 Marks Dec-2019 • PTU B-TECH
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Dec 2023 Discuss the following techniques for the synthesis of nanoparticles: a) Ball milling
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What do you mean by carbon nanotubes? Give two procedures for synthesis of carbon nanotubes.Long Answer 4 Marks Dec-2019 • PTU B-TECH
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May 2024 What are Carbon nanotubes”? What are the different types of Carbon nanotubes? Discuss top-down method of synthesis of nano particles. ~*~ NOTE : Disclosure of Identity by writing Mobile No. or Marking of passing request on any paper of Answer Sheet will lead to UMC against the Student.
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May 2019 What are Carbon nanotubes? Discuss how various types of carbon nanotubes can be formed from graphene?
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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?
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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.
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