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)
108
(b)
107
(c)
109
(d)
1010
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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.
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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.
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Code No. : 41125 E