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Energy and its sources

 Energy is the ability to do work or the total power derived from our natural

resources. The energy exists in many forms and can be converted from one form
of energy into another. Energy in usable form is dissipated to the surroundings as

less usable form.

 Energy is mainly derived from natural sources like the sun, oceans, fossil fuels,

wind etc. and is converted into electrical energy that we consume for our daily
needs and benefits.

What Is a Good Fuel?

A good source of energy

 Sources can be classified as renewable and nonrenewable sources of energy.

 Any source of energy that does not get depleted or gets exhausted is considered
a good source of energy and are usually called as renewable.

Good fuel

A good source of energy/fuel should be:

 Easily available

 Easy to store and transport

 Able to perform large amounts of work per unit mass and volume

 Economical