H2 has been used as a rocket fuel. Would you consider it as a cleaner fuel than
CNG? Why or why not?
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Define: OTE (ocean thermal energy).
Though a hot iron emits radiation, yet it is not visible in the dark, why?
Why is biogas a better fuel than animal dung-cakes?
Can any source of energy be pollution-free? Why or why not?
How is the supply of electricity maintained in a windmill when there is no wind?
In a solar panel when there is no sun?
Which of the following is not an example of the biomass energy source?
(a) Wood,(b) gobar gas,(c) atomic energy,(d)coal.
Why is there so much emphasis on changing over from petrol/diesel driven
automobiles to CNG-driven vehicles?
Which of the following sources of electricity involves more running expenses and
why? Thermal power station, Hydro power station, solar cells or Geothermal source.
The cost of production of electricity in a thermal power station located in
Bihar/Jharkhand/Orissa is less than in Gujarat/Maharashtra.Do you agree? Justify
your answer.
Explain, why is a reflector used in a solar cooker?
Explain, why a sheet of glass is used in solar heating devices?
Though wood is renewable source of energy, but the use of wood as a fuel is not wise decision. Explain.
What are OTEC power plants? How do they operate?
Why Hydrogen cannot be used as a domestic fuel?
Why is biogas called a clean fuel?
Name the process that produces a large amount of energy in the sun.
What fraction of solar energy reaches the earth‘s surface?
Name the materials used for making solar cells.
What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?
Uploaded bysandeep View Answer
What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?
What are the qualities of an ideal source of energy?
On what basis would you classify energy sources as
(a) renewable and non-renewable?
(b) exhaustible and inexhaustible?
Are the options given in (a) and (b) the same?
What are the limitations of extracting energy from -
(a) the wind? (b) waves? (c) tides?
Compare and contrast bio-mass and hydro electricity as sources of energy.
Compare and contrast fossil fuels and the Sun as direct sources of energy.
Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun's energy?
(a) Geothermal energy
(b) Wind energy
(c) Nuclear energy
(d) Bio-mass
Which of the following is not an example of a bio-mass energy source?
(a) wood
(b) gobar gas
(c) nuclear energy
(d) coal
Give the names of two energy sources that you would consider to be exhaustible. Give reasons for your choices.
A solar water heater cannot be used to get hot water on
(a) a sunny day (b) a cloudy day
(c) a hot day (d) a windy day
Name two energy sources that you wouldconsider to be renewable. Give reasons for your choices.
What are the advantages of nuclear energy?
What is geothermal energy?
Hydrogen has been used as a rocket fuel. Would you consider it a cleaner fuel than CNG? Why or why not?
What are the limitations of the energy that can be obtained from the oceans?
What kind of mirror - concave, convex or plain - would be best suited for use in a solar cooker? Why?
How has the traditional use of wind and water energy been modified for our convenience?
Why are we looking at alternate sources of energy?
If you could use any source of energy for heating your food, which one would you use and why?
What is a good fuel?
What is a good source of energy?
sandeep View Answer