Question

Sorces of energy sslc complete notes please

Answer 1

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Introduction to Source of Energy

Source of energy is anything which supplies us useful energy for carrying out the various activities like
(i) Heat energy to cook food
(ii) Electrical energy to lighten the room.
(iii) Muscular energy to carry bag and to run bicycle
(iv) Sound energy to call friends.

Renewable and Non-Renewable Source of Energy

Renewable source of energy is the energy source which can be replenished in short period. Example Solar energy, hydropower
An energy source which cannot be recreated in short period is categorized as non-renewable source of energy. Example Fossil Fuel-oil, natural gas, Coal

Good Sources of Energy

A good source of energy has following characteristics:
(i) It could do a large amount of work per unit volume or mass.
(ii) It would be easily accessible.
(iii) it would be easy to store and transport.
(iv) It would be economical.

Fossils Fuels

-Fossils fuel are the remains of the pre-historic animal and plants buried under the earth millions of years ago.bv
-They are non-renewable sources of energy
- Since fossils fuels from plants and animals and they get energy from Sun, so their ultimate source of energy is Sun
Example
Coal, Petroleum products


Turbine

A turbine is device that rotates when steam, water or wind false on its blades. The turbine turns the shaft of the electric generator and then electricity is produced 

Solar Energy

Solar energy is the energy of Sun. The earth receives a huge amount of energy from the sun. Traditionally We have been solar energy for drying clothes and grains, make salt from sea water


Solar cooker

Solar cooker is a device which is used to cook food by using solar energy. Solar cookers and solar water heaters are based on the facts that A black surface absorbs more heat as compared to a white or a reflecting surface under identical conditions
Solar cooker is having box type structure and its internal surfaces are coloured with black colour. Solar cookers are covered with a glass plate. Which traps heats to go out from box and shows greenhouse effect. A plane mirror is also used to focus the rays of the light. The food which need to be cooked ins kept inside the box and temperature around 140o C in summer in 2-3 hour and cooked the food
Ocean Thermal energy

The water at the surface of the sea or ocean is heated by the Sun while the water in deeper sections is relatively cold. Ocean-thermal-energy conversion plants Exploits this difference in temperature. The warm surface-water is used to boil a volatile liquid like ammonia. The vapors of the liquid are then used to run the turbine of generator. The cold water from the depth of the ocean is pumped up and condense vapour again to liquid


Geothermal Energy

Geo means earth and thermal means heat. So, Geothermal energy is the energy which is obtained from heat inside the earth.
Sometimes molten rocks formed in the deeper hot regions of earth’s crust are pushed upward and trapped in certain regions called ‘hot spots’ and when underground comes in it contact, steam is generated and that steam can be used to power turbine


Nuclear energy

Nuclear energy is generated through the process of Nuclear Fission. In Nuclear fission, A heavy nucleus is bombarded with a low energy neutron. In this process, it splits into two lighter nuclei with a tremendous release of energy which can be utilized to boil water to run turbines.
Nuclear energy is generated in a controlled manner in the Nuclear reactor
The major hazard of nuclear power generation is the storage and disposal of nucleus wastes because they are radioactive
Nuclear FusionNuclear Fusion means joining lighter nuclei to make a heavier nucleus, most commonly hydrogen or hydrogen isotopes to create helium
2H + 2H → 3He (+ n)
It releases a tremendous amount of energy,
The source of energy in the Sun and other stars is also because of Nuclear fusion reaction.

hydrogen bomb

The hydrogen bomb is based on thermonuclear fusion reaction. A nuclear bomb based on the fission of uranium or plutonium is placed at the core of the hydrogen bomb. This nuclear bomb is embedded in a substance which contains deuterium and lithium. When the nuclear bomb (based on fission) is detonated, the temperature of this substance is raised to 107 K in a few microseconds. The high temperature generates sufficient energy for the light nuclei to fuse and a devastating amount of energy is released.

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Answer 2

Answer:

Solar Energy. Solar power harvests the energy of the sun through using collector panels to create conditions that can then be turned into a kind of power

Wind Energy

Geothermal Energy

Hydrogen Energy

Tidal Energy

Wave Energy

Hydroelectric Energy.

Biomass Energy.