Energy and Its Sources.pptx Energy is the capacity to do work

Energy is the capacity to do work, and it exists in various forms such as mechanical, thermal, chemical, electrical, nuclear, and radiant (light) energy. Here’s an overview of the main types of energy sources:

Renewable Energy Sources
Solar Energy

Source: Sunlight
How It Works: Photovoltaic cells convert sunlight directly into electricity, while solar thermal systems use sunlight to heat fluids that produce steam to drive turbines.
Wind Energy

Source: Wind
How It Works: Wind turbines convert the kinetic energy of wind into electrical energy.
Hydropower

Source: Flowing Water
How It Works: Water flowing from a higher to a lower level spins turbines connected to generators that produce electricity.
Biomass Energy

Source: Organic Materials (plants, agricultural waste, etc.)
How It Works: Biomass can be burned directly for heat or converted to biofuels for transportation and other energy needs.
Geothermal Energy

Source: Heat from the Earth’s Interior
How It Works: Wells are drilled into geothermal reservoirs to bring hot water and steam to the surface, which can then be used to drive turbines connected to electricity generators.
Non-Renewable Energy Sources
Fossil Fuels (Coal, Oil, Natural Gas)

Source: Ancient Organic Matter
How It Works: Fossil fuels are burned to release heat, which is used to generate steam that drives turbines to produce electricity or to power internal combustion engines.
Nuclear Energy

Source: Uranium or Thorium
How It Works: Nuclear reactors use controlled nuclear fission reactions to produce heat, which is used to generate steam that drives turbines to produce electricity.
Emerging and Alternative Energy Sources
Hydrogen Energy

Source: Water or Natural Gas (via electrolysis or steam methane reforming)
How It Works: Hydrogen can be used in fuel cells to generate electricity, emitting only water as a byproduct.
Tidal and Wave Energy

Source: Ocean Tides and Waves
How It Works: Specialized turbines and devices convert the kinetic and potential energy of tidal flows and ocean waves into electricity.
Energy Storage and Efficiency
Batteries

Source: Various chemical reactions (e.g., lithium-ion)
How It Works: Batteries store electrical energy chemically and release it when needed.
Pumped Hydro Storage

Source: Elevation Differences
How It Works: Water is pumped to a higher elevation during low energy demand periods and released to generate electricity during peak demand periods.
Supercapacitors and Flywheels

Source: Kinetic or Electrical Storage
How It Works: These devices store energy either in the form of electric fields or rotational energy and release it quickly when needed.
Summary
Energy comes from a variety of sources, both renewable and non-renewable. Renewable sources like solar, wind, and hydropower are sustainable and have lower environmental impacts, while non-renewable sources like fossil fuels and nuclear energy are more traditional but come with higher environmental and safety concerns. Emerging technologies

1. Energy and Its Sources By Anjali shah kannu

2. Sources Sun Wind Water Tide Fuel Bio gas

3. Need of energy For making food For lightning For running machines For transport For industrial activities and agricultural work

4. What is Good Source of Energy Which would do a large amount of work per unit mass. Cheap and easily available. Easy to store and transport. Safe to handle and use. Does not cause environmental pollution.

5. Fuels The materials which are burnt to produce heat energy are known as fuels. Example: wood, coal, LPG, kerosene.

6. Characteristics of a Good Fuel → Burn without giving out any smoke or harmful gases. → Proper ignition temperature. → Cheap and easily available. → Easy to handle, safe to transport. → Convenient to store. → Burn smoothly.

7. Wind energy Energy obtain from wind ,called wind energy. It is Eco friendly source of energy. Renwable source of energy.

8. Advantages of wind energy Renewable energy Inexhaustible Not pollutant Reduces the use of fossil fuels

9. S olar energy Energy obtained from the sun is called solar energy. Eco- friendly Not pollutant

10. Solar energy devices Solar cooker Solar water heater Solar cells

11. Advantages of solar energy Renewable energy Inexhaustible Not pollutant Reduces the use of fossil fuels

12. THANK YOU