Physics Vtu Important Questions (module Wise) 36d

Physics Important Questions (VTU) Module 1 1. Describe Photoelectric effect along with Einstein’s Explanation -6M Jul14,12/Jan13 2. Describe Davisson and Germer experiment for confirmation of de-Brogile hypothesis. – 8M – Jul/Jan 14,13 3. Obtain the Time independent Schrodinger’s time independent wave equation for a particle in one-dimensional Potential well of infinite height and discuss the Eigen Values – 8M -Jul/Jan 14,13 4. What is Heisenberg’s Uncertainty Principle? Discuss its significance. – 4MJul 14,13 5. State de-Broglie hypothesis. -2M-Jul14 6. Define Group Velocity and Phase Velocity, obtain the expression for the same (on the basis of superposition of waves). -8M-Jul14 7. Show that Planck’s law reduces to Wein’s law and Rayleigh-Jeans law under certain conditions. -8M-Jul13 8. Using Uncertainty principle, prove that electron does not exist inside the nucleus. – 4M- Jan 13 9. What’s a wave function? Explain the properties of a wave function. – 4MJul 11,13

Module 2 1. Explain the failures of Classical Electron theory and merits of Quantum free electron Theory -8M – Jul14,12,13 2. Explain Fermi-energy and Fermi Factor. Discuss the probability of occupation of various energy states by electron at 𝑇 = 0°𝐾 and 𝑇 > 0°𝐾 on the basis of Fermi Factor. -8M -Jul 14,13 3. Explain the : a. Relaxation Time b. Mean Collision Time c. Drift Velocity - 8M – Jul 14/12 4. What is Mean Collision Time & Density of States? Using free electron theory in a metal, obtain the expression for electrical conductivity in of mean collision time. -8M – Jul13 5. State and explain Matthiessen’s Rule -4M -Jul13,14 6. Explain Type I and type II Superconductors -8M

Module 3: 1. Explain the construction and working of 𝐶𝑂2 laser -8M 2. Explain the construction and working of Semiconductor Diode laser -8M 3. Explain the principle of holography, various techniques and mention its applications. -8M -Jul/Jan 14,12,13 4. What is attenuation? Explain the various mechanism through which attenuation takes place. (or) Derive the Attenuation Coefficient -8M 5. Discuss the different types of optical fibers with suitable diagrams. – 6M Jun/Jul 12,11 6. Explain laser welding and cutting and drilling process with diagrams -4M Jul 13,12 7. Explain the spontaneous emission, stimulated emission and Meta Stable State – 8M – Jul 13,14 8. Discuss point-to-point optical fiber communication system and mention its advantages – 8M -Jul/Jan 11,13 9. What is refractive index profile? Describe three types of optical fiber with applications. -8M – Jan/Jul 13,14 10. Explain the construction, principle and working of LIDAR. -8M -Jan/Jul 12,14,11 11.Explain the requisites and conditions of a laser system -4M – Jan/Jul 11,13 Module 4: 1. Define Packing Factor. Calculate the packing factor for SC, BCC and FCC structures. -8M- Jan/Jul 14,13 2. Describe the construction and working of Bragg’s X-ray spectrometer. -6M -Jan/Jul 13,12 3. Derive an expression for Inter-Planar Spacing in a cubic system -6M – Jan/Jul 13,12,11 4. What are Miller Indices? Explain the procedure to find Miller Indices with an example – 4M – Jan/Jul 13,12 5. Explain the crystal structure of diamond and show that atomic packing factor of diamond is 0.34. -8M – Jan/Jul 11,12

Module 5: 1. With simple illustration describe the two methods of preparation of nano materials. -8M – Jan/Jul 13,14,15 2. What are nano materials? Write the structure and application of carbon nano tubes. -8M – Jan/Jul 11,13 3. Explain the density of states in Nano materials. -6M – Jan/Jul 12,14 4. With a neat labeled diagram describe the Arc Discharge Method -6M 5. With a neat labeled diagram describe Pyrolysis Method or Chemical Vapor Deposition (CVD) Technique -6M 6. With a neat labeled diagram, write the construction and working of Scanning Electron Microscope. -8M 7. What is Mach Number? Describe ultrasonic, subsonic, supersonic waves. -6M 8. What are shock waves? Give its applications. -6M 9. With a neat labeled diagram, write the construction and working of Reddy Shock Tube. -8M

All the Best! Dr. Muhammad Faisal