Master of Science I (Physics-Materials Science)
Examination: Oct Nov 2016 Semester I (Old CBCS)
SLR No. Day
Date Time Subject Name Paper
No. Seat No.
SLR SH
538
Friday
18/11/2016
10:30 AM
to
01:00 PM
Condensed Matter
Physics
C
II
Instructions: Attempt five questions.
Q.No.1 and 2 are compulsory.
Answer any three questions from Q.No.3 to Q.No.7.
Use of non scientific calculator is allowed.
All question carry equal marks.
Total Marks: 70
Q.1 Choose the correct alternative: 08
Type of lattice in three dimensions is
Twelve Four
Fourteen One
In cubic lattice:

Both a and b None of the above
Which semiconductor material is made from coal ash?
germanium silicon
tin carbon
When an electron jumps from the valence shell to the conduction band,
it leaves a gap. What is this gap called?
energy gap hole
electron-hole pair recombination
Electron pair bonding occurs when atoms:
lack electrons share holes
lack holes share electrons
In superconductors, the Fermi energy level is
Below the ground state
Midway between the ground state and first excited state
Above first excited state
At first excited state
The energy required to break a cooper pair is the energy gap
of superconductor.
One half Equal to
Twice Thrice
Which of the following conductor has highest critical temperature?
Aluminium Zinc
Molybdenium Tin
Page 1 of 2
State true or false: 06
Lattice Basis= Crystal structure
A. True B. False
A covalent bond is when atoms lose valence shell electrons.
A. True B. False
A set of planes cuts intercepts 3a, 2b and c on Y and Z axes the miller
indices of planes are (236).
A. True B. False
The atomic radius of f.c.c. lattice is
A. True B. False
For dielectric, skin depth is inversely proportional to frequency.
A. True B. False
The reciprocal of attenuation constant is called depth of penetration.
A. True B. False
Q.2 Attempt following:
Orientational polarization 05
Discuss skin effect. 04
High TC Superconductivity 05
Q.3 Discuss about Miller indices and interplaner spacing. 08
Explain the concept of reciprocal lattice. 06
Q.4 Explain the concept of packing fractions. 04
Distinguish between reduced, periodic and extended zone schemes of
representing band gap.
10
Q.5 What is Bloch function? 04
Derive the relation for Fermi level in n-type semiconductor. 10
Q.6 Derive and explain the rectifier equation of a pn junction. 10
Explain the defects in solids. 04
Q.7 What is superconductor? Discuss London theory in detail. 10
Explain Type-I and Type-II superconductors with examples. 04