Engineering Physics SATHYABAMA UNIVERSITY B.E B.Tech 2014 Question Paper

Register Number

                               

SATHYABAMA UNIVERSITY

(Established under section 3 of UGC Act,1956)

Course & Branch :B.E/B.Tech - AERO/AUTO/BTE/CHEM/CIVIL/M&P/MECH

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

Sub. Code :6C0018(2008/2009)      Time : 3 Hours

Date :18/12/2014                          Session :FN

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                                       PART - A      (10 x 2 = 20)

                        Answer ALL the Questions

1.     What is low temperature physics?  

2.     What are the disadvantages of cascade process?

3.     Define singular points.

4.     Give the important applications of photoelasticity.

5.     What are ultrasonic waves and what is its maximum wavelength?

6.     A quartz crystal of density 2650 Kg/m³ is vibrating at resonance. Calculate the velocity of longitudinal waves in the crystal. The elasticity of the crystals is 7.9 x 10¹⁰N/m².

7.     What is the main function of Bucky grid in radiography system?

8.     Define the resolution of a NaI (Tl) detector system.

9.     What are Bravais lattices?

10.   Define coordination number. What are the coordination number in S.C.,B.C.C.,F.C.C and H.C.P

                                PART – B      (5 x 12 = 60)

Answer All the Questions

11.   (a) State the principle behind adiabatic demagnetization of paramagnetic material.

        (b) Discuss the method of adiabatic demagnetization for getting low temperature.

(or)

12.   (a) What is the refrigerator?

        (b) Give the basic requirements of a liquid to act as refrigerant.

        (c) Explain the principle of refrigeration with block diagram.    

13.   Explain photo elasticity and photo elastic method. Explain stress-optic law and obtain an expression for the same.

(or)

14.   Explain Quarter wave plate (QWP) and Half wave plate (HWP). Discuss about the determination of thickness of QWP and HWP for the positive and negative crystals.

15.   Discuss the magnetostriction method of producing ultrasonic waves. List the merits and demerits.

(or)

16.   Explain the measurement of blood pressure by ultrasonic Doppler shift blood pressure meter.

17.   What is Radiography? Explain the radiographic setup with a neat sketch. Discuss the merits and demerits.

(or)

18.   Explain in detail the working of scintillation detector system with a diagram.

19.   Calculate coordination number, atomic radius and packing density for a simple cubic and body centered cubic crystals.

(or)

20.   Show that the separation between lattice planes in a cubic crystal is  d_(hkl) =1/ Ö (h²/k²+k²/b²+l²/c²).

Dr MGR University: B.Tech, 1st Semester Engineering Physics, January 2013 Question Paper

Dr MGR Educational and Research Institute, Chennai

B.TECH DEGREE EXAMINATIONS, JANUARY- 2013

Subject Code: BPH001

Engineering Physics

Time: three hours                                      Maximum Marks: 100

PART A (10 x 2= 20 MARKS)
Answer All Questions

1. Define coefficient of viscosity and critical velocity.

2. State Hookes law.

3. Define Emissive and Absorptive power.

4. What is meant by radial flow of heat?

5. Write any four properties of a good refrigerant.

6. Distinguish between isothermal and adiabatic process.

7. Distinguish between intensity of sound and loudness.

8. What is Phon and Sone?

9. Write any four differences between in step index and graded index fibers.

10. What are active and passive sensors.

Part B (5 x 16 = 80 Marks)
Answer All Questions

11. a) Derive an expression for the internal bending moment of a beam.

b) Discuss a method to determine the Youngs modulus.

(or)

12. a) Compare solid and hollow shafts.

b) Compare the viscosities of two liquids using Ostwalds Viscometer.

13.a) Discuss the method of determining the thermal conductivities of glass.

b) Derive the thermal conductivity of material by radial flow of heat method.

(or)

14. Derive an expression for heat conduction through compound media which are is series and parallel.

15.a) Explain with a neat sketch the working of Frigidaire.

b) Explain the entropy-temperature diagram of Carnot Cycle.

(or)

16. Explain the working of Otto engine with a neat diagram and also derive its efficiency.

17. Derive Sabines formula for reverberation time by Jagers method.

(or)

18.a) Explain the measurement of absorption coefficient.

b) Two trains are approaching each other with a speed of 36km per hour. If the engine of the train emits a note of 1000 vibrations, what will be the frequency of the note as heard by a person sitting in the other train? Velocity of sound in air= 330m/sec

19.a) Explain the construction and working of a CO2 laser.

b) Explain IMT sensor.

(or)

20. With a neat diagram explain the construction and working of He-Ne laser.