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Monday, October 20, 2008

Question Paper of Micro Control And Digital Signal of M.Sc. Physics May 2007 of Annamalai University

( PAPER - X )


( Revised Regulations )
( Including Lateral Entry )


Time :
3 Hours
Maximum : 100 Marks

PART - A (5 × 4 = 20)

Answer any FIVE questions.

All questions carry equal marks.

1. Distinguish between micro - controller and micro - processor.

2. What are the key features of 8051 micro - processor ?

3. Briefly explain call instructions.

4. How signals are classified ? - Explain.

5. What are the properties of discrete time systems ?

6. Explain direct and indirect addressing modes.

7. Write a short note on digital filter structure.

8. What do you understand by music synthesis ?

PART - B (5 × 16 = 80)

Answer any FIVE questions.

All questions carry equal marks.

9. What is meant by memory organisation ? Explain data memory and programming memory.

10. What are the special functions of registers ? Explain the working of counters and timers.

11. Describe arithmetic, logical, jump and call instructions of 8051 with examples.

12. Describe with a block diagram the functioning of digital signal processing and what are its advantages.

13. What are Random signals ? What are the various types of sampling ? Distinguish between up sampling and down sampling.

14. Explain MasonĂ­s gain formula and state its uses and applications.

15. Discuss in detail the basic concepts of DFT and FFT based spectrum analysis.

16. Write short notes on :

(i) FIR filter structure.
(ii) Nyquist theorem.

Question Paper of Solid State Physics And Materials Science of M.Sc. Physics May 2008 of Annamalai University





(Revised Regulations)

(Including Lateral Entry)

2nd June

Time: 3 Hours
Maximum: 100 Marks

SECTION-A (5×4=20)

Answer any FIVE questions

All questions carry equal marks

1. Describe the crystal structure of cubic zinc sulphide.

2. Show that 5-fold rotation symmetry is not possible in point group.

3. What is Hall Effect? Obtain an expression for the Hall Co-efficient of a material.

4. Discuss the energy bands of a metal.

5. What is Tunneling? Discuss single particle tunnelling in super conductors.

6. Explain ‘Flux quantisation’ and ‘persistent current’ in a super conducting ring.

7. State and explain the Meissner effect.

8. Define a polymer. Discuss briefly, the mechanisms of polymerization.

SECTION-B (5×16=80)

Answer any FIVE questions

All questions carry equal marks

9. a) Explain point defects, surface defects, grain boundaries and dislocations in crystals.

b) Explain Miller’s indices with an example.

10. With suitable diagrams and necessary theory explain the De Hass Van Alphen effect.

11. a)
Explain how thermodynamics is employed to study the superconductivity transition.

b) Write a note on Hall Effect in semi conductors.

12. a) What is Ferro electricity? Discuss ferroelectric classifications and the general properties with dipole theory.

b) Write a note on “excitation” and emission of luminescence.

13. a) Explain how thermodynamics is employed to study the super conductivity transition.

Explain thermodynamics of Ferro electric transitions.

14. a) Discuss the mechanism of photoconductivity and deduce an expression for the gain factor of a photo conductor.

b) Distinguish between thermoluminescence and electroluminescence.

15. a)
Describe any one of the methods to grow a single crystal from melt.

b) Explain briefly, the various electrical and optical properties of thin films.

16. Write short notes on:
a) Reciprocal lattice
b) A.C.Josephson Effect.
c) Type-II super conductors

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