N A L A N D A O P E N U N I V E R S I T Y
M.Sc. Physics, Part-II
PAPER-XII
(Science and Technology of Renewable Energy)
Annual Examination, 2016
Time 3 Hours. Full Marks 80
Answer any Five Questions.
All questions carry equal marks.
1. Explain spectral response. How will you calculate quantum efficiency from spectral response
2. What do you understand by first, second and third generation of solar cells What efficiency
they can achieve
3. State and explain the Diode equation for non-ideal and ideal Diodes. Illustrate the Diode law
graphically and explain the importance of dark current. Explain depletion approximation.
4. Explain importance of Fill Factor in a solar cell and derive its expression. Also, discuss,
in details, the efficiency of solar cell.
5. Derive Betz's law and show that maximum efficiency of the rotors can't exceed 60%. What
are the factors that limit the use of wind energy
6. What are environmental impacts of harnessing the geothermal, the wave and the tidal
energy What are the methods employed in harnessing the tidal energy
7. Explain minority carrier life time and diffusion length in simple semi conductor crystals.
8. Explain series and shunt resistance and their effects on Fill Factor in solar cells.
Distinguish between characteristics and parasitic resistances.
9. Explain the perspectives of hydrogen energy in the World. Give an account of the pilot
programmes. What are safety risks involved with application of hydrogen fuel
10. Write notes on Ideal Solar Cell Wind Energy.