Question 1
1 Mark
Which of the following is a non-renewable source of energy?
Options
Option A
Wood
Option B
Sun
Option C is correct
Fossil fuels
Option D
Wind
Questions & Answers: "Sources of Energy"
Complete guide to "Sources of Energy" for Physics students. Below you will find important questions and model answers to help you prepare.
16 Questions
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Question 2
1 Mark
Acid rain happens because
Options
Option A
sun leads to heating of upper layer of atmosphere
Option B is correct
burning of fossil fuels release oxides of carbon, nitrogen and sulphur in the atmosphere
Option C
electrical charges are produced due to friction amongst clouds
Option D
earth atmosphere contains acids
Question 3
1 Mark
Fuel used in thermal power plants is
Options
Option A
water
Option B
uranium
Option C is correct
biomass
Option D
fossil fuels
Question 4
1 Mark
In a hydro power plant
Options
Option A is correct
Potential energy possessed by stored water is converted into electricity
Option B
Kinetic energy possessed by stored water is converted into potential energy
Option C
Electricity is extracted from water
Option D
Water is converted into steam to produce electricity
Question 5
1 Mark
Which is the ultimate source of energy?
Options
Option A
Water
Option B is correct
Sun
Option C
Uranium
Option D
Fossil fuels
Question 6
1 Mark
Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation?
Options
Option A
Nuclear energy
Option B
Thermal energy
Option C is correct
Solar energy
Option D
Geothermal energy
Question 7
1 Mark
Ocean thermal energy is due to
Options
Option A
energy stored by waves in the ocean
Option B is correct
temperature difference at different levels in the ocean
Option C
pressure difference at different levels in the ocean
Option D
tides arising out in the ocean
Question 8
1 Mark
The major problem in harnessing nuclear energy is how to
Options
Option A
split nuclei?
Option B
sustain the reaction?
Option C is correct
dispose off spent fuel safely?
Option D
convert nuclear energy into electrical energy?
Question 9
1 Mark
Which part of the solar cooker is responsible for greenhouse effect?
Options
Option A
Coating with black colour inside the box
Option B
Mirror
Option C is correct
Glass sheet
Option D
Outer cover of the solar cooker
Question 10
1 Mark
The main constituent of biogas is
Options
Option A is correct
methane
Option B
carbon dioxide
Option C
hydrogen
Option D
hydrogen sulphide
Question 11
1 Mark
The power generated in a windmill
Options
Option A
is more in rainy season since damp air would mean more air mass hitting the blades
Option B
depends on the height of the tower
Option C is correct
depends on wind velocity
Option D
can be increased by planting tall trees close to the tower
Question 12
1 Mark
Choose the correct statement
Options
Option A is correct
Sun can be taken as an inexhaustible source of energy
Option B
There is infinite storage of fossil fuel inside the earth
Option C
Hydro and wind energy plants are nonpolluting sources of energy
Option D
Waste from a nuclear power plant can be easily disposed off
Question 13
1 Mark
In a hydroelectric power plant more electrical power can be generated if water falls from a greater height because
Options
Option A
its temperature increases
Option B is correct
larger amount of potential energy is converted into kinetic energy
Option C
the electricity content of water increases with height
Option D
more water molecules dissociate into ions
Question 14
1 Mark
Choose the incorrect statement regarding wind power
Options
Option A
It is expected to harness wind power to minimum in open space
Option B is correct
The potential energy content of wind blowing at high altitudes is the source of wind power
Option C
Wind hitting at the blades of a windmill causes them to rotate, the rotation thus achieved can be utilised further
Option D
One possible method of utilising the energy of rotational motion of the blades of a windmill is to run the turbine of an electric generator
Question 15
1 Mark
Choose the incorrect statement
Options
Option A
We are encouraged to plant more trees so as to ensure clean environment and also provide bio-mass fuel
Option B
Gobar-gas is produced when crops, vegetable wastes etc., decompose in the absence of oxygen
Option C is correct
The main ingredient of biogas is ethane and it gives a lot of smoke and also produces a lot of residual ash
Option D
Biomass is a renewable source of energy
Question 16
1 Mark
Why is there a need to harness non-conventional sources of energy? Give two main reasons.
Model Answer
(i) Our demand for energy is increasing to improve quality of life and growth of population. (ii) Fossil fuels are limited.