sources of electricity

Electricity is a secondary source of energy because it cannot be extracted from the ground, like fossil fuels, or captured from moving phenomena, such as water or wind. SOURCES OF ELECTRICITY Competen cy based Learning Module (Electricity ) 2. This source requires less investment as compared with wind turbines and PV cells. In some places, pockets of oil and gas can be found, because non-porous rocks have trapped them. It is less expensive in comparison with other energy sources because it is easily available everywhere, especially in seabed, seashores, and hilly areas. It is thought that with new discoveries these fossil fuels will last well into the next century. They cannot work in rainy season, snowfall and cloudy weather. One of the benefits is that this energy can easily be converted into electrical energy with the help of photovoltaic cells which have the characteristic to produce electric current when sunlight strikes on to their surface. When these fuels are burned they produce the gas carbon dioxide, which is a greenhouse gas and is a major contributor to global warming. In both of the cases, a huge amount of heat is generated that helps to create steam which in turn rotates turbines and produces electricity. The pressure from these layers and heat from below the Earth's crust gradually changed the once-living material into oil and natural gas. In recent times, offshore drilling has become more prevalent because of easy availability on offshore sites. The combustion of wood is not favourable at all times, especially because of increasing pollution. Furthermore, the combustion of coal also produces gaseous waste such as sulphur dioxide, nitrogen dioxide, and carbon monoxide etc. water), which can be used for other purposes. Water is available in plenty of amounts on earth. Burning coal without first purifying it contributes to global warming, as well as to the production of smog (smoke and fog), which is harmful to health. In case of commercial uses, the demands for electricity rise to higher levels. Is the Coronavirus Crisis Increasing America's Drug Overdoses? Sulphur dissolves into water and causes acid mine drainage which can influence thousands of miles from one to another country. It is an eco-friendly process of generating electricity which doesn't pollute environment and produces electricity on-demand. They include coal, oil and natural gas, which generate electricity when they burn in large electric power plants. South Africa also has relatively large deposits. When coal burns it produces more carbon dioxide than oil. One drawback is that it produces harmful radiation which is life-threatening and extremely dangerous to health. Secondary types come from the transformation of primary energy: for example petrol, that derives from the treatment of crude oil and electrical power, obtained from the conversion of mechanical energy (hydroelectric plants, Aeolian plants), chemical plants (thermoelectric), or nuclear (nuclear plants). Coal, oil and natural gas are fossil fuels. Since uranium ore cannot be used directly therefore it goes through highly energy-intensive process that fabricates it into fuel rods. Friction It is a static electricity which is generated by rubbing two materials. Electricity is a secondary source of energy derived from primary sources. Crude oil (oil obtained from the ground) is a sticky, gooey black stuff. One advantage is that it produces electricity on-demand. file 00028 Question 4 There is a fundamental Law in physics known as the Law of Energy Conservation. Estimates vary, however, because we do not know where all the resources are and we do know how quickly we will use them. Sources of electricity are everywhere in the United States. Over many millions of years, layers of mud or other sediments built up on top of these dead animals and plants. These sources of energy are relatively cheap and most are easy to get and can be used to generate power. Over time, the layers of rocks in the Earth's crust move and may become squashed and folded. It is a cost-effective source of energy. At first instance nuclear power seems more appealing because of low emissions and less land uses. Millions of years ago, trees and other plants grew rapidly in a tropical climate, and when they died they fell into swamps. The turbine used in recent times is more lucrative as compared to the age-old windmill because of its sturdiness, power, and noiselessness. It is relatively easy to transport because it is a solid. But, a large scale use might cause significant influence to the environment. Nuclear power is a very misunderstood subject by the general public. Producing electricity energy by using wind power is limited to windy areas because the set-up cannot be installed everywhere, particularly on those areas where speed of wind is very slow. It is thought that the current resources under the North Sea will last about another 20 years and the world resources will last for about 70 years. The kinetic energy of flowing water can be used to rotate turbines that on the other hand produce hydroelectricity. Wind: The kinetic energy of the rotating wind turbine helps to harness wind energy which is one of the easiest sources of renewable energy available in plenty of amounts. Renewable energy is used to generate 11 per cent of electricity. It is a black solid that is reasonably soft. Advertisement. There are different types of coal. Gas and oil were formed from the remains of small sea creatures and plants that died and fell to the bottom of seas. When coal burns it produces mainly carbon dioxide, some carbon monoxide and soot (which is unburned carbon). Natural Gas: The energy in nuclear power plants is produced through either fission reactions or fusion reactions. Natural gas and crude oil can be found in many places around the world, such as the Middle East (about 70 per cent of the world's known resources of oil), the USA and under the North Sea off the coast of the UK. A large hydroelectric project involves building a huge dam on a river, which in turn requires storing (or flooding) river basin to make a big reservoir.

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