Reg. No. : Code No. : 41125 E ......................................... Sub. Code : JMPH 52 B.Sc. (CBCS) DEGREE EXAMINATION, NOVEMBER 2018. Fifth Semester Physics – Main SOLID STATE PHYSICS (For those who joined in July 2016 and afterwards) Time : Three hours Maximum : 75 marks PART A — (10 × 1 = 10 marks) Answer ALL questions. Choose the correct answer : 1. 2. How many atoms per unit cell are in HCP structure? (a) 1 (b) 2 (c) 4 (d) 6 The coordination number in case of FCC is (a) 12 (b) 8 (c) 6 (d) 4 Sp 3. 4. Paramagnetic substances are (a) Aluminium (b) Platinum (c) Salts of nickel (d) All The susceptibility of a ferromagnetic substance is (a) Large negative (b) Large positive (c) 5. 6. 8. 9. (d) None The vanderwaal crystal is (a) Copper (b) Argon (c) Rock salt Ice (d) Modeling constant for simple crystal structure is (a) 1.2– 1.4 (b) 1.6 and 1.8 (c) 7. Low positive 1.3 – 1.5 (d) None In superconductvity the conductivity of a material becomes (a) zero (b) finite (c) infinite (d) none Type I superconductors are (a) Perfect paramagnet (b) Perfect diamagnet (c) Perfect ferromagnet (d) None 10 nm = ––––––––– m (a) 108 (b) 107 (c) 109 (d) 1010 Page 2 Code No. : 41125 E 10. The width of carbon nanotube is –––––––––. (a) 1 (b) 10 (c) 2.5 (d) 40 PART B — (5 × 5 = 25 marks) Answer ALL questions, choosing either (a) or (b). Each answer should not exceed 250 words. 11. (a) Describe the seven classes of crystals. Or 12. (b) Describe interplanar spacing. (a) Discuss briefly ferromagnetism. quantum theory of Or 13. (b) Write a short note on Dielectric loss. (a) Explain bonding energy of sodium chloride molecule. Or 14. (b) Write a short note on cohesive energy. (a) Describe Meissner effect in brief. Or 15. (b) Write the application of Josephson effect. (a) Describe ball milling method. Or (b) Discuss briefly synthesis of nanomaterial. Page 3 Code No. : 41125 E Sp PART C — (5 × 8 = 40 marks) Answer ALL questions, choosing either (a) or (b). Each answer should not exceed 600 words. 16. (a) Explain Hexagonal closed packed structure. Or 17. (b) Explain reciprocal lattices to SC, BCC, FCC. (a) Give the explanation internal field. of Heisenberg’s Or 18. (b) Explain ionic and orientational polarisation. (a) Explain ionic, covalent bonds in crystals. Or 19. (b) Explain the hydrogen bonds. (a) Explain Type I and Type II superconductors. Or 20. (b) Explain the occurrence of superconductivity. (a) Explain electrodeposition method. Or (b) Describe the multiwalled carbon nano tubes. —————— Page 4 Code No. : 41125 E