question_answer1)
Fuels used in thermal power plants are fossil fuels. Why?
question_answer2)
Which is the ultimate source of energy?
question_answer3)
Though a hot iron emits radiations, yet it is not visible
in the dark. Why?
question_answer5)
Name two forms of energy in which solar energy manifests
itself in oceans.
question_answer7)
What does acid rain happen?
question_answer8)
What energy transformations occur in a hydro power
plant?
question_answer9)
How is the slurry left in a bio-gas plant in the end used?
question_answer11)
Name any two materials used for fabricating solar cells.
question_answer12)
Which gas is formed by decomposing plant and animal
matter in marshy areas?
question_answer13)
Give a few applications of wind.
question_answer15)
Give one constructive and destructive use of nuclear
power.
question_answer16)
What type of radiation is emitted by hot electric iron?
question_answer17)
Name two dams whose construction was opposed by local people.
question_answer19)
Which metal is used to connect various solar cells?
question_answer20)
Give one disadvantage of nuclear power.
question_answer21)
Name the source of wind energy.
question_answer22)
Why are thermal power plants set up near coal or oil
fields?
question_answer23)
How much energy requirement of India is met by hydro power plant?
question_answer24)
What is bagasse? To what use is it put to?
question_answer25)
Write the drawback of energy obtained from fusion.
question_answer29)
Which type of reflector is usually used in box type solar
cooker?
question_answer31)
Fuels used in thermal power plants are fossil fuels. Why?
question_answer32)
Which is the ultimate source of energy?
question_answer33)
Though a hot iron emits radiations, yet it is not visible
in the dark. Why?
question_answer35)
Name two forms of energy in which solar energy manifests
itself in oceans.
question_answer37)
What does acid rain happen?
question_answer38)
What energy transformations occur in a hydro power
plant?
question_answer39)
How is the slurry left in a bio-gas plant in the end used?
question_answer41)
Name any two materials used for fabricating solar cells.
question_answer42)
Which gas is formed by decomposing plant and animal
matter in marshy areas?
question_answer43)
Give a few applications of wind.
question_answer45)
Give one constructive and destructive use of nuclear
power.
question_answer46)
What type of radiation is emitted by hot electric iron?
question_answer47)
Name two dams whose construction was opposed by local people.
question_answer49)
Which metal is used to connect various solar cells?
question_answer50)
Give one disadvantage of nuclear power.
question_answer51)
Name the source of wind energy.
question_answer52)
Why are thermal power plants set up near coal or oil
fields?
question_answer53)
How much energy requirement of India is met by hydro power plant?
question_answer54)
What is bagasse? To what use is it put to?
question_answer55)
Write the drawback of energy obtained from fusion.
question_answer59)
Which type of reflector is usually used in box type solar
cooker?
question_answer63)
List four activities from our daily life in which solar
energy is used.
question_answer64)
Explain the principle on which a windmill works.
question_answer65)
LPG is a better fuel than coal. How?
question_answer66)
Why is tidal energy not exploited on a commercial
scale?
question_answer67)
List two ways in which animal dung is used as a fuel and
compare both the ways.
question_answer68)
What do you mean by bio-mass? Give examples of bio-mass.
question_answer69)
List the causes of increasing energy requirements.
question_answer70)
Expand OTEC. On what principle is it based?
question_answer71)
What are solar cells? List their uses.
question_answer73)
Which part of the solar cooker is responsible for
greenhouse effect?
question_answer79)
How do technological inputs improve the efficiency of
bio-mass fuel?
question_answer84)
What is a nuclear waste? What are the hazards of nuclear
waste to living things?
question_answer86)
Bio-gas is considered to be a boon to the farmers. Give reasons.
question_answer87)
How is nuclear energy generated during nuclear fusion?
question_answer89)
Write two different ways of harnessing energy from ocean.
question_answer91)
Hydro energy is an indirect source of solar energy.
Justify.
question_answer109)
What type of
reactions occur inside the Sun which produces solar energy?
question_answer112)
What type of energy
is possessed by wind?
question_answer113)
Though a hot iron
emits radiations, yet it is not visible in the dark, why?
question_answer114)
What is bagasse?
question_answer115)
Define anaerobic
degradation.
question_answer116)
Name the main
constituent of biogas. [NCERT Exemplar]
question_answer118)
Name two forms of
energy in which solar energy manifests itself in oceans.
question_answer119)
Name any two materials
that are used for making solar cells.
question_answer122)
State the two forms
of energy in which energy is mainly utilized at our homes.
question_answer123)
What are the
different types of nuclear reactions?
question_answer124)
Why does acid rain
happen? [NCERT Exemplar]
question_answer125)
What energy
transformations occur in a hydro power plant? [NCERT Exemplar]
question_answer126)
What is a chain
reaction?
question_answer127)
Why are we looking
at alternate sources of energy? [NCERT]
question_answer130)
What is the use of
the black painted surface in solar heating devices?
question_answer131)
State two
advantages and two disadvantages of geothermal energy.
question_answer134)
Why is biogas a
better fuel than animal dung cakes?
question_answer135)
Can any source of
energy be pollution-free? Why or why not? [NCERT]
question_answer136)
What causes the
wind to blow?
question_answer137)
Give some uses and
advantages of solar energy.
question_answer138)
Give an example of
indirect harnessing of solar energy.
question_answer141)
State the important
uses of solar cells.
question_answer142)
Explain solar cell
panel.
question_answer143)
State the important
uses of wind energy.
question_answer147)
Compare and
contrast biomass and hydroelectricity as sources of energy. [NCERT]
question_answer149)
Explain how the
energy of flowing water is related to solar energy.
question_answer156)
Biogas is
considered to be a boon to the farmers. Give reasons.
question_answer157)
How is nuclear
energy generated during nuclear fusion? [CBSE (AI) 2008C]
question_answer159)
[NCERT, CBSE (Al) 2008]
Give the
construction and working of a solar cooker
question_answer167)
[NCERT, CBSE (Al) 2008]
Give the
construction and working of a solar cooker
question_answer174)
Which part of the
solar cooker is responsible for greenhouse effect?
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