Acid rain happens due to
(a) sun leads to heating of upper layer of atmosphere
(b) burning of fossil fuels release oxides of carbon, nitrogen & sulphur in the atmosphere
(c) electrical charges are produced due to friction amongst clouds.
(d) none of these
Fuel used in thermal power plants is
(c) fossil fuels
What is the approximate value of solar constant on earth?
(a) 1.4 W/m2
(b) 1.4 kW/m2
(c) 1.2 W/m2
Ocean Thermal energy is due to
(a) energy stored by waves in the ocean
(b) temperature difference at different levels in the ocean
(c) pressure difference at different levels in the ocean
(d) tides arising out in the ocean
Which of the following is renewable energy?
(a) Wind energy
(b) Solar energy
(c) Hydro energy
(d) All of the above
Which country is known as country of winds?
The biggest constituent of Biogas
(d) Hydrogen Sulphide
In a hydroelectric power plant more electrical power can be generated if water falls from a greater height because
(a) its temperature increases
(b) larger amount of potential energy is converted into kinetic energy
(c) the electricity content of water increases with height
(d) more water molecules dissociate into ions
Mention the purpose of blackening the interior of a solar cooker.
Write the characteristic features of the micro-organisms which help in the production of biogas in a biogas plant?
What is a good source of energy?
What are the disadvantages of fossil fuels?
What is geothermal energy? Write its one advantage and one limitation.
Give the construction, working, advantages and disadvantages of a solar cooker.
State any three advantages of charcoal over wood.
Write the difference between conventional and non-conventional sources of energy?
What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?.
How is nuclear energy generated during nuclear fusion?
Explain the concept of hydrogen bomb?
What are the disadvantages of nuclear energy?