M.Sc. DEGREE EXAMINATION, NOVEMBER 2017
Third Semester
Physics
Elective ENERGY PHYSICS AND ENVIRONMENTAL
SCIENCE
(CBCS 2014 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. Mention the names of various types of wind mill.
2. List the three categories of Bio-mass resources.
3. Define Incident angle and surface azimuth angle for the
solar radiation geometry.
4. Explain the three components of thermal losses for the
incident solar radiation.
5. State the names of the main types of concentrating
collectors.
6. Name the design of various absorber shapes for CPC
reflectors.
Sub. Code
4MPH3E1
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7. State the main types of fuel cells and their main
components.
8. What are the desired properties of an ideal ion-exchange
membrane electrolyte?
9. List out the names of some potentially hazardous air
pollutants.
10. Name some of the "green house gases" that are dangerous
to human beings.
Part B x 5 25)
Answer all questions.
11. Explain briefly about wet processes and dry
processes in Bio-mass conversion.
Or
Describe the utilization of Hydrogen gas in various
applications. What are the advantages for Hydrogen
gas fuel engines. Explain the possibility of its use
for motor vehicles.
12. Derive the equation for estimation of average solar
radiation.
Or
Describe a pyranometer and give the names of its
various types.
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13. Describe with a diagram the functions of
parabolic trough collector mirror strip
reflector.
Or
Write the advantages and disadvantages of
concentrating collectors over flat-plate type of
collectors.
14. Describe a basic photo voltaic system for power
generation and write its applications.
Or
Write the main applications of fuel cells in various
categories.
15. Describe the physiological effects of So2 and No2
that cause major air pollution.
Or
List out the causes of ozone depletion and its
dangerous potential health effects on earth.
Part C x 10 30)
Answer any three questions.
16. Describe the basic components of a wind energy
conversion system. Mention its advantages and
disadvantages.
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17. Explain a typical flat-plate solar ray collector with a
sketch. List out the advantages and disadvantages of
concentrating collectors over flat plate type collectors.
18. Give a detailed performance analysis of a cylindrical
parabolic concentrating collector and derive an expression
for its collector efficiency.
19. Describe a typical photo-voltaic system and solar cell
principle. Derive an expression for conversion efficiency
and maximum power output.
20. Explain in detail about Nuclear, biological, soil pollution,
air, water pollution and global warming its causes and
side effects to human and cattle stock.
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