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Hydel power
Electricity is obtained from flowing water. The flow of water is checked by building a dam. The water from the dam is allowed to flow through the tunnels at a high pressure. Turbines convert the potential energy of the water into electricity. About 23,800 MW of energy is generated by hyde..
Hydroelectric power
Electricity is produced by converting the potential energy of water (from a height) into the kinetic energy of flowing water. Hydroelectricity or hydroelectric power is produced, when large quantities of water stored in dams at a suitable height, are released to fall from a hei..
Thermal Power Plant (Thermal Energy)
Large amount of fossil fuels are burnt everyday in power stations to heat up water, to produce steam which further runs the turbines to generate electricity. The transmission of electricity is more efficient than transporting coal or petroleum over the same distance. Therefore, many ..
Abbreviations in powers of 10 (used in SI units)
.e., Le systeme internationale d' unites, is a new, comprehensive and rationalised system of units, accepted by the 11 t h conference of weights and measures in 1960. It is used in science and technology all over the world, because of the following advantages over others. The units are more logical..
Electric Circuits
Your everyday experiences have familiarised you with many electric circuits. Let us take an example of an electric circuit with a battery (a source of electricity), toaster and a switch..
Your everyday experiences have familiarised you with many electric circuits. Let us take an example of an electric circuit with a battery (a source of electricity), toaster and a switch..Interference
is contamination by extraneous signals from human sources, other transmitters, power lines and machinery, switching circuits, etc. Interference occurs most often in radio systems whose receiving antennas usually intercept several signals at the same time. Radio-frequency interf..
Domestic Electric Circuit
Domestic Electric Circuit - Electric power is usually generated at places which are far from the places where it is consumed. Distribution of Electricity from Grid The power is transmitted over long distances at high voltage to minimize the loss of energy during transmission. Fo..
Domestic Electric Circuit - Electric power is usually generated at places which are far from the places where it is consumed. Distribution of Electricity from Grid The power is transmitted over long distances at high voltage to minimize the loss of energy during transmission. Fo..Question 5
Question: Why are mitochondria also called 'The Power House of cell'? Answer: Energy in the food molecules is converted here (in the mitochondria) into usable energy and stored as ATP molecules. Hence, they are called the power house of the cells..
Domestic Electric Circuits
>The earth wire is much thicker in size and is made of copper. One end of it is connected to a copper plate buried deep under the earth. The earth connection is made to the electric meter and then to the main switch. In our homes, we receive supply of electric power through a ma..
Law of Conservation of Energy
Let us see what is actually taking place in the following examples: Steam engine: The coal burns. Heat due to the combustion of coal converts water into steam. The expansive force exerted by the steam on the piston of the engine moves the locomotive. Chemical energy is converted..
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