Annamalai University 2010-1st Year B.Sc Physics , (part-iii-a-main) (-i) 530properties of matter and thermal - exam paper

Total No. of Pages: 1233

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B.SC. DEGREE EXAMINATION, 2010

(PHYSICS)

(FIRST YEAR)

(PART-III-A-MAIN)

(PAPER-I)

530. PROPERTIES OF MATTER AND THERMAL PHYSICS


May) (Time: three Hours
Maximum: 100 Marks

PART-A
ans any TEN ques. (10×2=20)
All ques. carry equal marks

1. Define the 3 elastic moduli.
2. Distinguish ranging from uniform and non-uniform bending.
3. Define bending moment and provide the expression for it.
4. Define angle of contact.
5. State the correction for length of tube in Poiseuille's formula.
6. What happens when a capillary tube is immersed in a liquid? Why?
7. State Fick's laws of diffusion.
8. Define Osmatic Pressure.
9. Define transpiration and transfusion.
10. What are thermostats?
11. Define temperature gradient.
12. Define coefficient of linear expansion.
13. State 2nd legal regulations of thermodynamics.
14. What is an indicator diagram? provide its use.
15. Find the efficiency of the carnot's engine working ranging from 127 and 27





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PART-B
ans ALL ques. (5×7=35)
All ques. carry equal marks

16. a) What is a Cantilever? find an expression at the free end of a thin light beam clamped horizontally at 1 end and loaded at the other.

(OR)
b) Describe with necessary theory, how the rigidity modulus of the wire is determined by using the Maxwell's needle?

17. a) define the rotating cylinder method of determining the viscosity of a liquid.
(OR)
b) Describe Jaegar's method of studying the variation of surface tension with temperature.

18. a) discuss what you understand by diffusion. discuss how the diffusivity of a salt can be determined experimentally?

(OR)
b) Deduce the relation ranging from the osmotic pressure and the elevation of boiling point of a solution.

19. a) define an experiment to obtain the quantity co-efficient of a gas.

(OR)
b) Describe weight thermometer method to obtain the apparent expansion of a liquid.

20. a) State and prove Carnot theorem.

(OR)
b) Explain the concept of entropy. find an expression for the entropy of a perfect gas.

PART-C
ans any 3 ques. (3×15=45)
All ques. carry equal marks

21. Derive an expression for the bending of a bar supported at the 2 ends and loaded in the middle. define an experiment to determine young modulus by bending.

22. Describe Rankine's experiment for the measurement of the viscosity of a gas.

23. Deduce the relationship ranging from osmotic pressure and relative lowering of vapour pressure. compute the lowering of vapour pressure of a molar solution of a non electrolyte in water.
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24. Define co-efficient of thermal conductivity. define Forebe's method for determining the thermal conductivity of a metal rod.


25. Describe with diagram the working of a diesel engine and deduce the expression for its efficiency.


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Earning:   Approval pending.