Engineering Physics - unit wise Questions

EP unitwise questions

1. Unit Wise Important Questions
Unit 1
Part A
1. Define absorption, spontaneous and stimulated emission
2. List out the conditions to achieve laser action.
3. What are the different methods of achieving population inversion?
4. Define Optical Resonator or Resonator cavity
5. List out the applications of lasers.
6. What are the conditions for a ray to undergo total internal reflection?
7. Explain the construction of an optical fibre
8. List out the applications of optical fibers
9. Define Numerical aperture, Acceptance angle and Critical angle

Part -B
1. What are Einstein coefficients and develop a relation between various Einstein’s
coefficients
2. Draw a neat diagram to represent the components of a Ruby laser and explain its
construction and working.
3. Explain the construction and working of semiconductor laser
4. Describe the fiber drawing process (double crucible method)
5. Develop expressions for numerical aperture and acceptance angle of an optical fibre.
6. Explain the classification of optical fibers.
7. Explain the construction and working of CO2 LASER.
8. Explain the propagation of waves through optical fibers with appropriate diagrams

Unit -2
Part A
1. Define crystallography
2. Define Space Lattice and Bravais Lattice
3. Calculate the ratios of the interplanar distance d100 : d110 : d111
4. Give the names of seven crystal system
5. Define dielectric Polarization
6. List out the four types of Polarization
7. Explain the structure Barium Titanate
8. Define Magnetic Susceptibility
9. List out the application of Ferroelectric materials
10. Define Meissner effect
11. Define persistent current
12. List out the applications of superconductor
13. Define Magnetic Levitation
Part B
1. Develop an expression for electronic polarizability in DC Electric Field
2. Explain the variation of polarization with respect to temperature and frequency
3. Explain the classification of magnetic materials
4. Explain the domain theory and Hysteresis curve of ferromagnetism
5. Difference between soft and hard magnets
6. Distinguish between Type I and Type II superconductors
7. What are miller Indices? How are they calculated that describes a plane in a crystal

2. 8. Find out the interplanar distance of cubic system
Unit -3
Part A
1. Classify the materials into conductors, semiconductors and Insulators based on band
gap
1. What are de- Broglie matter waves
2. Write the properties of matter waves
3. What is de-Broglie wavelength associated with an electron
4. Give the physical significance of wave function
5. What are eigen values and eigen functions
6. Define Quantum Entanglement and Quantum Tunnelling
7. Define Quantum Tunneling
8. Define Qubits
9. Define Moore’s Law
10. List out the properties of qubits
Part -B
1. Derive Schrödinger time independent equation
2. Derive Schrödinger time dependent equation
3. Apply Schrodinger’s Time Independent Wave Equation for a particle in a potential
well and developed Eigen values and Eigen functions.
4. Explain the representation of qubit using Bloch Sphere.
5. List out differences between classical and quantum computing

Unit – 4
Part – A
1. Give the drawbacks of the classical free electron theory
2. Distinguish between conductors and insulators
3. What are intrinsic and Extrinsic semiconductors. Explain
4. What is a Thermistor and write a brief note on its application?
5. Mention the applications of Hall Effect
6. What is PN Junction diode?
7. Define Hall effect

Part – B
1. Explain Kronig – Penney Model and Draw its conclusions.
2. Develop an expression for Intrinsic Carrier Concentration.
3. Describe a PN Junction diode? Draw the volt – ampere characteristics of PN junction
and explain the nature
4. What is Hall Effect? Give an elementary theory of Hall effect
5. What is Thermistor and explain its characteristics?
Unit – 5
Part – A

1. Define thin films
2. List out the factors affecting the thin films
3. Define the principle of solar cell
4. List out the applications of thin films

3. 5. Distinguish between the bulk and thin film
6. Define nanoscale and surface to volume ratio
7. List out the applications of nanomaterials
8. What are carbon nanotubes
9. What are the various applications of nanomaterials
10. Define nanoscience and nanotechnology
11. Explain quantum confinement effect


Part – B
1. Explain thermal evaporation method
2. Explain the preparation for thin films by electron beam evaporation method
3. What is solar cell? Discuss the construction, working, I-V characteristics and uses of a
solar cell
4. Explain the preparation of nanomaterials by Top down Method