M.Sc. (Semester (CBCS) Examination Oct/Nov-2017
Nano-Technology
FUNDAMENTALS OF NANO TECHNOLOGY IN PHYSICS
Day Date: Thursday, 16-11-2017 Max. Marks: 70
Time: 10.30 AM to 01.00 PM
Instructions: Part-I, question 1 is compulsory.
Attempt any four questions from Part II
Figures to the right indicate full marks.
Answers to the Part I and Part II are to be written in same answer
book.
Part I
Q.1 Rewrite the sentence after choosing correct answer from the given
alternatives:
07
Bragg's law can be expressed by
nλ 2d sinθ nλ 2d sin2 θ
nλ 2d cosθ nλ 2d cos 2θ
In crystal has arrangement as a b c with
900
Tetragonal Triclinic
Monoclinic Orthorhombic
The quantum dots are dimensional nonmaterial's.
Zero One
Two Three
Polarization is measured as
P N P N
P P N
Dielectric constant E
ε0 − εr ε0/εr
ε0 εr εr/ε0
Nonmaterials are more reactive due to their
Size Surface area
Density Elasticity
originates similar as magnetism originates.
Superconductivity Conductivity
Insulators Dielectric
Q.1 Define the following terms. 07
Crystal
Fermi level
Quantum dot
Dielectric constant
Electronic polarization
Magnetism
Thermal property
Page 2 of 2
SLR-MU-705
Part II
Q.2 With neat labeled diagram explain crystal structure. 14
Q.3 Explain band structure of semiconductor. 14
Q.4 Discuss quantum theory of nanomaterials. 14
Q.5 Explain electronic and ionic polarization with a neat diagram. 14
Q.6 Answer any TWO of the following: 14
What ate applications of dielectric materials?
Explain the term Polarization.
Discuss Electroluminescence in brief.
Q.7 Write short notes on. (Any Two) 14
Nanostructure materials
Mechanical properties of nanomaterials
Electronic properties of nanomaterials.