only fossil fuel in sources of energy

1. SOURCES OF ENERGY
 conventional source of
energy
 non conventional source of
energy

2. CONVENTIONAL SOURCE OF CURRENT
The source of energy which have been in use since
a long time.
Example: coal ,petroleum, natural gas, hydel
energy, wind energy and nuclear energy.
*Also firewood is also a conventional source of
energy but its energy is now limited to kitchens
in rural parts of India.

3. FOSSIL FUEL
*They are the fuels formed inside the
earth from the remains of plants and
animals after a million of years
Example: coal, petroleum, natural gas.

4. COAL AND PETROLEUM
*Coal is the highest used energy source in India
*During the days of steam engine, coal is used for
steam engine
*Moreover coal was used in kitchen, before LPG
became popular
*Now a days coal is used mainly in industries.
But in olden days wood was used as the most
common source of heat energy.
*industrialisation has led to exploitation of coal which
led to better quality of life.

5. *The growing demand for energy was meet by the
use of fossil fuel like coal and petroleum.
*Even technologies are also developed for using
these resources. But it is conventional sources of
energy or non renewable sources of energy.
*So we have to conserve our resources from further
depletion and for the future use.

6. Petroleu
m oneof
thefossil
fuel

8. DISADVANTAGE OF BURNING FOSSIL FUEL
*Burning of fossil fuel has many disadvantages too.
*The oxides of carbon, nitrogen and sulphur that are
released on burning fossil fuel are acidic oxides.
*These acidic oxides mix with rain water to cause
acid rain, that leads to water and soil pollution.
*Even it causes problems like air pollution, green
house effect of gases like carbon di oxide.
*The pollution caused by burning of fossil fuel can be
reduced by complete combustion and by the
various techniques to reduce the escape of harmful
gases and ashes into the surroundings.

9. ACTIVITY DEMONSTRATING THE PROCESS OF
THERMOELECTRIC PRODUCTION

10. * Take a table tennis ball
*Make three slits of it[cut it into three]
*Put semicircular fins cut out of a metal sheet into three
slits
*Pivot the tennis ball on an axle through its centre with a
straight metal wire fixed for a rigid support.
*Now connect a cycle dynamo to this.
*Connect a bulb in series.
*Direct a jet of water or stream produced in a pressure
cooker at the fins
*We observe that the bulb glows.

11.  The simplest turbines have one moving part called
a rotor -assembly blade.
 The moving fluid i.e. air /water acts on the blade, so
the blade starts rotating and impart energy to the
rotor.
 Thus when fan is rotated, the rotor blade, the
speed which would turn the shaft of the dynamo
and convert mechanical energy into electrical
energy which has become necessary in today's
scenario .

12. GROUP MEMBERS
s.Harini [10A23]
s.Divyashree [10A22]
g.Jeevapriya [10A25]
r.Leelambiga [10A27]