Solved question paper for PHYSICS May-2013 (B-TECH 1st-2nd)
Solved Question Paper
Engineering physics May-2013
PTU • B-TECH • Mechanical Engineering • 1st-2nd • May-2013
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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SECTION - B & C. have FOUR questions each.Short Answer May-2013 • PTU B-TECH
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May 2013 SECTION - B & C have FOUR questions each.
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Select atleast TWO questions from SECTION - B & C.Short Answer May-2013 • PTU B-TECH
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May 2018 Select at least TWO questions from each SECTION - B & C. M-54016 Page 1 of 2
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May 2014 Select at least Two questions from each ofthe Sections B & C. Section —A
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May 2012 Selecting at least TWO questions from SECTION -B & C each .
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Write short notes on :Short Answer May-2013 • PTU B-TECH
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What do you understand by electromagnetic spectrum?Short Answer May-2013 • PTU B-TECH
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Dec 2011 What do you mean by electromagnetic spectrum?
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Define Poynting vector.Short Answer May-2013 • PTU B-TECH
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Dec 2017 Define Poynting vector.
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What do you understand by crystallography?Short Answer May-2013 • PTU B-TECH
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May 2018 What do you mean by crystallography?
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Explain the concept of population inversion.Short Answer May-2013 • PTU B-TECH
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May 2016 Define the term “population inversion”.
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Dec 2016 What is the concept of population inversion? (3)
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May 2008 Define population inversion. How it is achieved?
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What do you mean by unit cell?Short Answer May-2013 • PTU B-TECH
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May 2016 What do you mean by a primitive unit cell?
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What do you mean by fibre optic cable splicing?Short Answer May-2013 • PTU B-TECH
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Does ether exist? Comment. viii.Define time dilation.Short Answer May-2013 • PTU B-TECH
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Differentiate between phase velocity and group velocity.Short Answer May-2013 • PTU B-TECH
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May 2019 Differentiate between group and phase velocities of waves.
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May 2018 Differentiate between phase velocity and group velocity
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Dec 2007 Distinguish between phase and group velocity.
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What is electron confinement?Short Answer May-2013 • PTU B-TECH
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Dec 2017 Explain electron confinement.
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Dec 2011 What is Quantum confinement?
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Differentiate between conduction current and displacement current by taking some suitable example(s).Short Answer May-2013 • PTU B-TECH
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Show that equation of continuity, div 0pJ t is contained in Maxwell’s equations. (3,5)Short Answer May-2013 • PTU B-TECH
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A magnetic circuit is made of a ferromagnetic material of = 7.3 × 10 –3 henry/m. The average length of the circuit is l m and the area of cross-section is 90 cm 2. If the magnetic binding has 90 turns, calculate the magnetizing current in order to produce a magnetic flux density 0.2 weber/m 2.Short Answer May-2013 • PTU B-TECH
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Define magnetic permeability and magnetic susceptibility and develop a relation between them. (4,4)Short Answer May-2013 • PTU B-TECH
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Discuss the importance of excitation and absorption limit in X-ray spectra.Short Answer May-2013 • PTU B-TECH
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The electrons are accelerated by 350 volts and are reflected from a crystal. The first reflection maxima occur when the glancing angle is 30°. Determine the spacing of the crystal. Given h = 6.62 × 10 –34 J.s, e = 1.6 × 10 –19 C and m = 9 × 10 –31 Kg. (4,4)Short Answer May-2013 • PTU B-TECH
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What are Einstein coefficients? Discuss their significance in context of Laser operations.Short Answer May-2013 • PTU B-TECH
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He-Ne laser is superior to Ruby laser. Comment (5,3)Short Answer May-2013 • PTU B-TECH
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A step index fibre with a core diameter of 30 m and n 1 = l.530 and n2 = 1.515 shows absorption of 0.00002% of the incident power at each reflection at the core boundary. Find the attenuation in dB/km for such a fibre for a ray entering just below the acceptance angle. Assume that there are no other losses.Short Answer May-2013 • PTU B-TECH
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Elaborate the concept of material dispersion. (4,4)Short Answer May-2013 • PTU B-TECH
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May 2012 What do you understand by Material dispersion? (4,4)
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A flashing bulb is located 40 km from an observer. The bulb is fired and the observer sees the flash at 5.00 pm. What is the actual time when the bulb is fired?Short Answer May-2013 • PTU B-TECH
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Develop a relation between relativistic momentum and energy. (4,4)Short Answer May-2013 • PTU B-TECH
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Obtain Bohr’s condition of quantization of angular momentum using deBroglie’s idea of matter waves.Short Answer May-2013 • PTU B-TECH
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Develop energy time uncertainty relation and discuss some relevant application. (3,5)Short Answer May-2013 • PTU B-TECH
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“Surface to volume ratio gets enhanced at nanoscale”. Comment.Short Answer May-2013 • PTU B-TECH
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Discuss some important applications of carbon nanotubes. (4,4)Short Answer May-2013 • PTU B-TECH
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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?
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?
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