What is energy and its unit? | Source of renewable energy

You use different energy to do different things in your daily life, but do you know what is energy? We need the power to operate a wide variety of equipment including motorcycles, cars, buses, and airplanes. For which we use different types of fuels and electricity. This is the source of energy

what is energy
what is energy

Today, due to the increasing population, energy consumption is increasing day by day in urbanization and industrialization. According to one study, the primary energy consumption per person is 58 kWh per day. In the year 2019, the world primary energy consumption was 13.9 billion tows (tons of oil equivalents). As the population is increasing, the consumption of energy is also increasing.

In this article, we will go into detail about what is energy, what are its source, its type, and alternative sources of energy, etc. So let's first know what is energy?

What is energy?

The ability to do any work is called energy. In physics, energy is a property of objects, which can be transferred to other objects or transformed into different forms.

It is difficult to give a simple definition of energy, because it is not an object. It neither surrounds any place nor does it cast any shadow. We cannot even see it. We can feel this by the change in things. In short, like other things, it is not a substance, although it is often closely related to the matter.

See Also: What is Atmosphere?

What is the unit of energy?

As we know the unit of work is the joule. And energy is the ability to work, so its unit is also joule. Joule means Kgm2/s2.

Definition of 1 joule: The act of pushing an object 1 m with a force of 1 newton is called 1 joule. That is, the ability to push an object 1 meter with a force of 1 newton is 1 joule.

Sources of energy

The potency is obtained from where it is called a source of energy. In nature, various energies are in a stored state. For example, we use potency stored in minerals like coal, diesel, petrol, etc. for many purposes. Its source is divided into two main parts.

Sources of non-renewable energy

The sources that cannot be reconstructed or which take millions of years to rebuild are called sources of non-renewable energy. Such as coal, oil, natural gas, etc. Burning them produces potency. Once such sources are exhausted, reconstruction takes several years.

Sources of Renewable Energy: 

The sources that are reconstructed or can be built are called sources of renewable energy. Such as solar power, biomass, hydropower, geothermal energy, etc. Since the potency produced from such sources can be reused once used, such potency is never exhausted.

Energy sources and utilities

What is Fossil energy?

The potency derived from fossils buried in the interior of the Earth is called fossil energy. Since coal and mineral oil are produced in nature from plant residues, both are called fossil fuels.


Large quantities of coal are used as fuel in industries, factories, and trains. Coal has become the main fuel for iron, steel, and other metal factories, brick industries, and cement factories. Since coal takes millions of years to form, increasing its use will end reserves.

Mineral oil

Petrol, diesel, kerosene, etc. are mineral oils. These oils are mainly used as fuel in motorcycles, buses, ships, airplanes, etc. These minerals are extracted from underground mines. It is extracted from the mine as crude oil. It is processed into petrol, diesel, kerosene, Mobil, paraffin, etc. and the remaining material is used to make tar.

Benefits of fossil energy

  • The benefits of fossil energy are as follows.
  • It is cheaper and accessible than other types of fuel.
  • Mineral oil can be shipped easily
  • It is a very useful fuel. It is used to operate various vehicles and engines.
  • It is also used in industries that require adequate heat and power generation.


Electricity is the main source of energy, which is used in many modes of communication including state-of-the-art computers, TVs, and mobiles. Electricity can be generated in various ways but the cheapest and pollution-free energy is hydroelectricity. Although it may cost more to generate hydroelectric in the beginning, but it is always available seamlessly and is cheaper in the long run. Worldwide, it is currently consuming approximately 25 trillion kilowatt-hours of electricity.

Why Hydroelectricity Generation and Use is Widespread?

  • Even though the production cost is high, it is cheaper in the long run.
  • It does not cause any kind of pollution.
  • It is the sources of renewable potency, it never ends.
  • It is cheap and easy to broadcast. It is also easy to use.
  • State-of-the-art equipment including computers and other electronic equipment and means of communication are the only major sources of potency.
  • It operates state-of-the-art lighting equipment.

Alternative sources of energy

Potency used worldwide includes coal, mineral oil, and natural gas. But not all these power sources are renewable. Due to its widespread use, the store can be quickly exhausted. When the potency sources are exhausted in this way, a major energy crisis will arise in the world. To solve this, it is necessary to find alternative power sources.

Alternative sources of power that can be used as an alternative to the main sources of potency traditionally used are called alternative sources of energy. Here are some alternative sources of energy.

What is organic energy?

The potency derived from various parts of plants (biomass) and animal dung etc. is called bio-energy. Biomass is a piece of wood dust, husk, straw, and sawdust, which is pressurized by machine. Potency derived from biomass is called biomass energy. Firewood, straw, and grass are easily available sources of fuel for the village. Dung gas can be made using cow and buffalo dung. It can be used as an alternative resource.

What is Nuclear Energy?

The potency obtained from nuclear fusion and nuclear fission reactions are called nuclear power. There are two different ways of producing nuclear power.

1. Nuclear fusion

In the presence of extreme pressure and heat, larger elements are formed by combining small elements or atomic nuclei, and energy is also produced. This reaction is called nuclear fusion reaction. This reaction continues on the Sun and other stars.

2. Nuclear fission

Nuclear fission is the process by which the nucleus of a large atom is decomposed into smaller atoms. In the fission reaction, when an atom of radioactive elements uranium, plutonium, etc. is hit by an independent neutron, the atom breaks down and generates new atoms of smaller new elements. In this action, some mass is destroyed and immense potency is produced from the destroyed mass.

The potency generated from the destroyed mass is apparent from Einstein's mass energy equivalence relation (E = Mc2). According to this relation, E = Mc2 occurs. Where E = energy generated, m = mass lost and c = speed of light in vacuum.

What is Tidal Energy?

The potency that can be obtained from the rising tide on the coast of the sea is called tidal energy.

For this type of potency, a large dam is built near the water on the coast. When the tide rises in the sea, the water crosses the dam and gets trapped. When the tide returns, water from the coast moves into the middle of the ocean. The water trapped in the dam is sent back to the sea through pipes. The water flowing from the pipe rotates the turbine and produces electricity.

What is Wind Energy?

Wind energy is a type of potency that has been used for centuries. It is considered to be useful potency for driving boats, producing electricity and heating water, etc. It is also a source of renewable potency.

Plains, mountains, and high altitude areas always carry strong winds. Wind energy can be converted into electricity at a place where the regular wind blows. In such places, electricity can be generated through wind turbine towers. By which various types of electronic devices can be operated.

The potency that can be obtained from continuously flowing air is called wind energy.

What is geothermal energy?

The interior of the Earth is very hot. When a volcano erupts, hot melted liquid comes out from the inside. In areas where earthquakes and volcanoes are active, the temperature increases to about 80 ° C per kilometer depth. In other common areas, the temperature increases to 30 ° C per kilometer depth. Hot rocks are found in some deep parts of the Earth's surface. When water is transported to such a place, it immediately turns into steam. Power can be generated by operating a steam engine with steam power. The potency obtained from the heat inside the earth is called geothermal energy.

What is solar energy?

Solar energy is considered the most likely source of renewable potency. This potency is obtained from the Sun on Earth, which is called solar potency.
By its consumption, solar panels are used to heat water, charging batteries, operating water pumps, etc. Also, a huge amount of electricity is generated with the help of solar panels. In the current context of the world's largest potency crisis, it is appropriate to take it as a good option to solve this potency crisis.

What is the energy crisis?

In terms of potency use, the current global situation shows that about 75 percent of non-renewable power sources are being used. Deletion of these potency sources can cause potency crisis. To solve this crisis, we need to generate more hydroelectricity and increase the use of other alternative potency sources.

According to a study, the consumption of mineral oil and coal is currently increasing at an annual rate of 2.3 percent. If consumption continues at the same rate, by 2037 oil reserves will be reduced. Failure to develop and conserve alternative potency sources could lead to a major potency crisis in the future.

In history mainly it has been caused by localized shortages, wars, and market manipulation. Some have argued that government actions like tax hikes, nationalization of power companies, and regulation of the potency sector, shift the supply and demand of potency away from its economic equilibrium. However, the recent historical power crisis was not caused by such factors.

Market failure is possible when monopolistic manipulation of markets occurs. Industrial operations such as strikes organized by the union and government embargo can cause a crisis. This may be due to over-consumption in oil refineries and port facilities, aging infrastructure, chokepoint disruptions, or bottlenecks that restrict fuel supplies. An emergency can arise during very cold due to increased power consumption

Conclusion: Potency is very important to us. A major power crisis may arise in the future if alternative power sources are not encouraged to develop and conserve.

I sincerely hope that I have given you a lot of information about what is energy, as well as its sources, different types, and alternative source of energy, etc. Please comment if you have any confusion. I request all of you readers to share this information on various social media so that our awareness remains and it will benefit everyone. I need your help so that I can give you more new information. Please subscribe to our website.

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