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Posted By: Arun Jadhav Member Level: Diamond Posted Date: 16 Dec 2007
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2005 Shivaji University B.E Mechanical First Year Engineering Examination,2005 ,ENGINEERING PHYSICS-I Question paper
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First Year Engineering Examination,2005
ENGINEERING PHYSICS-I
Time:2 Hours
Maximum Marks:50
Instructions:
1)Attempt any two questions from each section.
2)Draw neat figures wherever necessary.
SECTION - I
1.a)Explain Compton effect and how it is experimentally verified.[Marks 6]
b)Acinema hall has a volume of 8500m3. It is required to have reverberation time of 1.6 sec.What will be the total absorption in the hall?[Marks 3]
c)What are the properties of electromagnetic radiations?[Marks 4]
2.a)What is magnetostriction effect? Explain magnetostriction oscillator with transistorised circuit diagram.[Marks 4]
b)Describe dual nature of matter.Derive an expression for the De Broglie wavelength.[Marks 4]
c)Determine the wavelength of primary X-ray which are scattered by graphite at an angle of 60 degrees in Compton scattering
The wavelength of scattered X-ray is 2.54*10^-11m.
3.Write a note on any three of following:[Marks 3*4=12]
1)Acoustics of building
2)Piezo-electric oscillator
3)Applications of ultrasonic waves
4)Complete electro-magnetic spectrum
SECTION - II
4.a)Discuss "Nuclear fission as a source of energy".[Marks 4]
b)Define multiplication factor. How is this related with size of fissionable material.[Marks 5]
c)Express the energy released by 1 gram atom of U-235 in MeV.[Marks 4]
5.a)Describe the formation of bands in solids.[Marks 5]
b)What is superconductivity? What are the characteristics of superconductors?[Marks 5]
c)A critical field for niobium is 1*10^5 A/m at 8K and 2*10^5A/m at 0 K. Calculate the transition temperature of the element.[Marks 2]
6.Write notes on any two:[Marks 6*2=12]
a)Nuclear Fusion Reactor
b)Effect of temperature and concentration an shifting of Fermi level in P & N type semi-conductors.
c)Working of PNP transistor in CB configuration with energy band diagram.
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