Solid State Physics Question Bank
Paper Code: 4BPHE2C
PART –A
Answer ALL the question ( No Choice)(Each answer not exceeding 50 wards in one or two sentences)
(10 x 2 = 20 marks)
Unit – I1. What is cohesive energy?
2. What are the classifications of cohesive force in crystal?
3. List out the different types of bonding with any two examples.
4. Define the Lattice energy
5. Obtain the dissociation energy.
6. What is ionization energy?
7. Define electron affinity.
8. Define Born Haber cycle.
9. Draw the structure of the hydrogen bond in water
10. Give the formula of electrostatic energy of an ionic crystal.
11. Define Madelung constant.
12. What holds a crystal together?
Unit - II
13. Distinguish between conductor and insulator.
14. Define Isotope effect.
15. Define Meissner effect.
16. What are these simplest way to understand the AC and DC Josephson effect?
17. What is Coherence length?
18. Write note on zero resistivity of a super conductor.
19. What is the meant by phonon cloud?
20. Give the modern theory of super conductivity.
21. How is the contribution of cooper pairs of electrons in the superconductor?
22. Write the BCS theory.
23. Write the idea of penetration depth
24. Write the central properties of superconductors.
Unit - III
25. Write note on physical properties of metals
26. Define polarization
27. Mention the various fields of dielectric parameters.
28. Write note on electrical conductivity of metals.
29. What is dielectric breakdown?
30. State Weidmann – Franz’s law
31. What are the types of polarization?
32. Define the dielectric constant of an isotropic medium.
33. Define the polarizability of an atom.
34. List out the types of dielectric materials
35. Write down the Clausius – Mossotti equation
36. Give the applications of dielectric materials.
Unit – IV
37. List out the optical properties of semiconductors.
38. Give the types of semiconductors with example?
39. Distinguish between conductors, semiconductors and insulators.
40. Give the relations between carrier concentration and mobility of different semiconductors.
41. Find polarity of semiconductor through the sign of the Hall voltage.
42. Write a note on intrinsic semiconductors
43. Write a note on extrinsic impurity semiconductors with suitable examples
44. What is the Physical law manifested in the continuity equation?
45. Deduce Einstein relation
46. What is meant by conductivity in a semiconductor?
47. What is the value of the Hall coefficient? Assume no acceptor atoms are present and that Eg ≫ k T.
48. Give two important applications of Hall effect.
Unit – V
49. Give an application of photo diode.
50. Define Thermistors
51. What is the meant by avalanche photo diode?
52. Define the unit of photo conductivity.
53. Draw neat diagram of solar cell.
54. What is meant by Luminescence?
55. What is the physical significance of photo diode?
56. List out the semiconductor devices.
57. Distinguish between Photo conductivity and electrical conductivity.
58. Write the relation between Photo conductive cell and solar cell
59. Define Photo Voltaic effect.
60. Give few semiconductor applications.