BE All branches 6C0003 (2006/07/08/09) Applied physics Sathyabama University Dec 2010

Register Number

                               

SATHYABAMA UNIVERSITY

(Established under section 3 of UGC Act, 1956)

Course & Branch: B.E/B.Tech- All Branches

Title of the Paper: Applied Physics                       Max. Marks: 80

Sub. Code: 6C0003 (2006/07/08/09)                      Time: 3 Hours

Date: 03/12/2010                                                    Session: FN

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PART - A                (10 X 2 = 20)

Answer ALL the Questions

1.     What are the different modes of heat transfer?

 

2.     Define the coefficient of thermal conductivity of the material.

3.     What is the f-ratio of photographic camera?

4.     What is astigmatism?

5.     State Weber – Feckner Law.

6.     What should be the total absorption in a hall of volume 10000m³, if it is required to have a reverberation time of 1.4 seconds?

7.     Define Young’s modulus of elasticity.

8.     What is the Bending moment of a beam?

9.     What are matter waves?

10.   Calculate the de Broglie wavelength of an electron, accelerated by a potential difference of 100 volts.

      PART – B                         (5 x 12 = 60)

Answer All the Questions

11.   (a)    Explain the process of ice formation on ponds.

(b)   Explain the process of the heat conduction in a compound
        medium arranged in parallel.

(or)

12.   Describe with relavant theory, the method of determining the co efficient of thermal conductivity of a bad conductor by Lee’s disc method.

13.   (a)    What is achromatism.                                                     (2)

(b)   Discuss the condition for achromatism when two lenses are
        in contact.                                                                       (10)

(or)

14.   Discuss in detail, the different types of monochromatic aberrations and the ways of minimizing them.

15.   Derive Sabine’s formula for reverberation time.

(or)

16.   (a)    What is meant by sound absorption coefficient?           (2)

(b)   Explain the experimental method used to measure the
        absorption coefficient of a material.                              (10)

17.   Derive an expression for the Young’s modulus of the cantilever by statical method, when the beam is loaded at the center.

(or)

18.   Derive an expression to find the depression in a cantilever loaded at the free end.

19.   Explain with a neat sketch, the experimental determination of matter waves using Davisson – Germer experiment.

(or)

20.   Derive Schrdinger time independent and dependent wave equation.

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