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Posted Date: 21 Mar 2019      Posted By:: Sitakalyani    Member Level: Gold  Points: 3 (₹ 2)

2017 Acharya Nagarjuna University M.Sc. Physics M.Sc.(Second) Physics examination on Solid State Physics - I in May 2017 Question paper



Course: M.Sc. Physics   University/board: Acharya Nagarjuna University

This is M.Sc. (Second) examination question paper on Solid State Physics - I from Acharya Nagarjuna University. It is useful for the students who appear for final examinations of M.Sc.(Second) Physics and also for competitive examination in Physics.



M.Sc.(Second) DEGREE EXAMINATION, MAY - 2017
PHYSICS
Second Year
Solid State Physics - I
Time: 3 Hours Maximum Marks:70


Answer any Five of the following

All question carry equal marks

1) a) What are symmetry operations? Explain the meaning of a 'n' fold rotation axis and n- folds scew
axis.

b) Explain different point groups and span groups in a crystal lattice.

2) a) Explain the Laue's interpretation of x-ray diffraction in crystals.

b)Explain the determination of lattice constants.

3) a) Define tomic conesion and explain the conesire energy.

b) Explain the ball and spring model of a harmonic crystal.

4) a) Explain the normal modes of a one dimensional diatomic chain.

b)Explain the phonon dispersion by inelastic Neutron scattering.

5) a) Give the assumptions of classical theory of lattice specific heat.

b) Explain quantum theory of heat capacity.

6) Discuss in detail the Kronig - penny model for the motion of electron in a periodic potential.

7) a) Explain the nearly free electron model.

b) Obtain an expression for carrier density in extrinsic semiconductor.

8) a) State and explain Hall effect.

b) Explain thermoelectric effect.

9) Write a notes on any Two of the following:

a) Braggs law

b) Quantization of Lattice vibrations

c) An harmonic effects

d) General features of extrinsic semiconductors.





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